人教版八年级上册 Unit 2How oft en do you exercise？学案（含答案）

Unit 2　How often do you exercise
Section A (1a—2d)
【自主预习·探新知】
Ⅰ. 英汉互译，了解本课重点短语
1. 帮着做家务 ____________
2. 几乎不 ____________
3. 每周一次 ____________
4. 每月两次 ____________
5. 使用互联网 ____________
6. on weekends ____________
7. go shopping ____________
8. go to the movies ____________
Ⅱ. 完成对话，明确本课重点句型
1. —________ ________ do you exercise
—Twice a week.
2.—________ ________ you usually ________ on weekends
—I usually go shopping with my mother.
3. —________ your favorite program
—Animal World.
【合作探究·破疑难】
【要点突破】
【观察思考】
阅读下面句子，思考并完成下面的探究总结
He hardly_ever watches TV. 他几乎不看电视。
Mary can hardly speak Chinese.
玛丽几乎不会说中文。
Tom studies hard but his brother hardly studies.
汤姆学习很用功但是他的弟弟几乎什么也不学。
【探究总结】　hardly与hard的用法辨析
hardly hardly副词，表示________(肯定/否定)意义，常与can/could或ever等词连用
hardly通常用在助动词、be动词或情态动词________(之前/之后)，实义动词________(之前/之后)
hard hard用作形容词，意为“困难的；硬的”
hard用作副词，意为“努力地；猛烈地”
注意hardly虽然在构词上可以看作由hard+-ly构成，但是它并不是hard的副词形式。
【对点训练】
①他几乎不会说汉语。
He _______ ______ Chinese.
②他努力地看黑板，但是几乎什么也看不见。
He looked ________ at the blackboard but could ________ see anything.
【观察思考】
阅读下面句子，体会句中画线部分的用法
—How_often do you watch TV 你多久看一次电视？
—Twice a week. 一周两次。(教材第10页)
—How_long will you stay here 你将在这儿待多久？
—For two weeks. 两周。
—How_soon will Sam be back 萨姆再过多久回来？
—He'll be back in an hour. 他将在一小时后回来。
—How_many_times do you watch TV every week
你每周看多少次电视？
—Three times. 三次。
【探究总结】
(1)how often表示“多久一次”，用于询问动作频率，答语常用once/twice/three times a week/month ...及always, sometimes, hardly ever, never等。
(2)how often与其他常见特殊疑问词的用法辨析
how often “多久一次”， 提问在某一特定的时间里某个动作发生的次数
how ________ “(延续)多长时间”，答语常用for或since引导
how ________ “还要多久……”，常用于将来时态，答语常用“in＋一段时间”
how ________ “多少次”，提问次数，其答语为once, twice, three times 等
【对点训练】
①My brother plays basketball twice_a_week. (对画线部分提问)
________ ________ does your brother play basketball
②他借那本杂志多久了？
________ ________ has he kept the magazine
③—________ do you take art lessons a week
—Three or four times.
A. How long B. How many times
C. How soon D. How often
【达标检测】
Ⅰ. 用所给词的适当形式填空
1. My father sometimes ________(go) to work by bike.
2. My grandpa often ________(exercise) in the park.
3. —How often do you go to the movies
—I go to the movies ________(one) a month.
4. They use the Internet four ________(time) a week.
5. There is nothing in the fridge. Do you want ________(go) shopping with me
Ⅱ. 单项选择
1. —________ does your brother play football
—Three times a week.
A. How often B. How long
C. How many times D. How many
2. —________ is your favorite program
—Running Man.
A. When B. What
C. How D. Where
3. —Are you free today
—No, today is ________ for me.
A. free B. empty
C. hungry D. full
4. I go to the library twice a week, ________ Wednesday and Saturday.
A. in B. at
C. with D. on
5. I like English, so I ________ read it in the morning.
A. usually B. hardly ever
C. never D. ever
Section A (Grammar Focus—3c)
【自主预习·探新知】
Ⅰ. 英汉互译，了解本课重点短语
1.看电视 _____________
2. 踢足球 ______________
3. 至少 ______________
4. stay up late ______________
5. eat a healthy breakfast ______________
6. play sports ______________
Ⅱ. 完成句子，明确本课重点句型
1. 我经常帮妈妈做家务。
I often ________ Mum ________ ________．
2. ——你多久看一次电影？
—________ ________ do you go to the movies
——一月两次。
—________ ________ month.
3. 我几乎不喝牛奶。
I ________ ________ drink milk.
4. ——你的父母经常运动吗？
—________ your parents often ________ sports
——是的，每天都运动。
—Yes, every day.
【合作探究·破疑难】
【要点突破】
【观察思考】
阅读下面句子，思考并完成下面的探究总结
I go to the movies maybe once a month.
我大概一个月去看一次电影。(教材第11页)
Maybe you are right. 或许你是正确的。
You may_be interested in this book.
你可能对这本书感兴趣。
【探究总结】 　maybe 与may be的区别
maybe 副词，意为“大概；或许；可能”，常置于________，也可置于句中
may be “情态动词may＋动词原形be”，意为“可能是；或许是”，在句中作谓语
【对点训练】
①He may be a student. (改为同义句)
________ he is a student.
②Tom ________ in the library now. I met him at the
library door just now.
A. may be B. can't be
C. maybe D. isn't
【语法聚焦】
【观察思考】
阅读下面句子，思考句中频度副词的用法
They often help with housework.
他们经常帮着做家务。(教材第11页)
She sometimes goes shopping. 她有时去购物。(教材第11页)
—How often does Sam watch TV
萨姆多久看一次电视？
—He hardly_ever watches TV.
他几乎从不看电视。
This job will never be finished.
这项工作永远也不会完成。
He is always ready to help others.
他总是乐意帮助别人。
【探究总结】
(1)频度副词的含义
表示动作频率的副词叫作频度副词。本单元所学的频度副词按频率发生的高低依次为always>usually> often> sometimes>hardly (ever)>never。
(2)频度副词的用法
①频度副词在句中位于be动词、助动词或情态动词________(之前/之后)，实义动词 ________(之前/之后)。对频度副词提问用 ________。
②频度副词通常和一般现在时连用，表示现在经常或反复发生的动作或存在的状态。
【对点训练】
①He watches TV once_a_week. (对画线部分提问)
________ ________ does he watch TV
②After the long trip, I was so tired that I could ________ walk any longer.
A. always B. hardly
C. sometimes D. never
③Meals are very boring. He ________ has the same thing to eat every day.
A. never B. usually
C. sometimes D. hardly ever
【达标检测】
Ⅰ. 用所给词的适当形式填空
1. We often go ________(swim) in the afternoon in summer.
2. ________ your father ________(get) up early every morning
3. My little brother ________(drink) milk every morning.
4. Vegetables are ________(health) food. My mum likes to eat them.
5. We usually ________(sleep) for seven hours every night. What about you
Ⅱ. 单项选择
1. —________ she do on weekends
—She often helps her mother.
A. How do B. How does
C. What do D. What does
2. —I saw you come to school by bus this morning.
—Oh, I ________ come to school by bus, but it is raining today.
A. hardly B. always
C. sometimes D. usually
3. —________ do you read English
—Every morning.
A. What time B. How often
C. How long D. How soon
4. My grandfather walks at ________ two hours every day, so he is very healthy.
A. little B. least
C. few D. less
5. Bill plays basketball ________．
A. two a week B. twice
C. twice a week D. two times a week
Section B (1a—1e)
【自主预习·探新知】
英汉互译，了解本课重点短语
1. 垃圾食品 ______________
2. 想让我喝牛奶 ______________
3. 对……有好处 ______________
4. good habits ______________
5. drink coffee ______________
【合作探究·破疑难】
【要点突破】
1. want sb. to do sth. 想要某人做某事
【观察思考】
阅读下面句子，体会句中画线部分的用法
But my mother wants me to drink it.
但我妈妈想要我喝它。(教材第12页)
They want good jobs. 他们想要好工作。
Did you want to tell me anything
你是不是想告诉我什么事情？
【探究总结】　
(1)want sb. to do sth. “想要某人做某事”，否定式为want sb. not to do sth.，意为“不想要某人做某事”。
(2)want “要，想要”，与would like同义，后可接名词、代词、动词不定式。
feel like也表示“想要”，但其后接动词时要用v.-ing形式，即feel like doing sth.，意为“想要做某事”。
【对点训练】
①The movie is boring. I want ________(go) home now.
②爸爸想让我每天做运动。
Dad ________ ________ ________ ________ sports every day.
【观察思考】
阅读下面句子，思考good的相关短语的不同含义
She says it's_good_for my health.
她说它对我的健康有好处。(教材第12页)
Miss Liu is_good_to us. 刘小姐对我们很好。
My friend Bill is_good_at English.
我的朋友比尔擅长英语。
Are you good_with the kids in your school
你和学校里的孩子相处得好吗？
【探究总结】　 good的相关短语辨析
be good for 意为“对……有好处”，反义词组：be bad for 对……有害
be good to 意为“对……友好(和善、慈爱)”，相当于be friendly/kind to，后面一般接人
be good at 意为“擅长，善于”，后接名词、代词或动名词，相当于do well in
be good with 意为“和……相处得好”，相当于get on well with
【对点训练】
①我们都知道吸烟对健康有害。
We all know that smoking ________ ________ ________ our health.
②My cousin is good at ________(dance).
③我们应该对老人好一些。
We should be ________ ________ old people.
【达标检测】
Ⅰ. 用方框中所给词的适当形式填空
　coffee, vegetable, healthy, junk, sleep　
1. I like to eat________ food, although it's not good for my health.
2. The baby ________ ten hours every night.
3. Tom likes to have a cup of ________ in the morning.
4. We should eat a lot of ________ and fruit, but little meat.
5. I think ________ is very important, so I exercise every day.
Ⅱ. 单项选择
1. There are a few ________ but little ________ in the cupboard.
A. apples; coffee B. coffee; apples
C. apple; coffees D. apple; coffee
2. We should exercise more to ________ in good health.
A. want B. make
C. have D. keep
3. ________ hours do the students in this school sleep every night
A. How many B. How much
C. How old D. How long
4. My parents want me ________ hard at school.
A. work B. works
C. working D. to work
5. Fruit and vegetables are good ________ your health.
A. for B. to
C. with D. at
Section B (2a—2e)
【自主预习·探新知】
Ⅰ. 英汉互译，了解本课重点短语
1. play sports ________________
2. not ... at all ________________
3. the answer to ________________
4. 上网 go ______________
5.例如 such_____________
Ⅱ. 完成句子，明确本课重点句型
1. 以下是结果。
________ ________ the results.
2.我们感到惊讶的是90%的学生每天都上网。
We ________ ________ that ________ ________ of the students ________ ________ every day.
3.通过使用网络或观看游戏节目来放松是很好的。
________ ________ ________ ________ ________ by using the Internet or watching game shows.
4. 我认为最好的放松方式是通过锻炼。
I think ________ ________ ________ ________ ________ is ________ ________．
【合作探究·破疑难】
【要点突破】
1. although conj. 虽然；尽管；即使
【观察思考】
阅读下面句子，思考并完成下面的探究总结
Although many students like to watch sports, game shows are the most popular. 虽然很多学生喜欢看体育类节目，但游戏类节目是最受欢迎的。(教材第13页)
Maybe I'm not very healthy, although I have a healthy habit. 尽管我有一个健康的习惯，但我可能不是很健康。
【探究总结】　 although的两种常见用法
(1)although连词，意为“虽然；尽管”，引导让步状语从句，相当于though。其引导的从句既可位于主句之前，也可位于主句之后。
(2)although与but ________(能/不能)同时出现在一个句子中。
【对点训练】
①________ the girl is very young, ________ she can look after her grandmother.
A. Although; but B. But; although
C. Although; / D. But; /
②尽管他学习非常努力，但是考试没有及格。
________ ________ ________ ________， he failed the exam.
【观察思考】
阅读下面句子，体会句中画线部分的含义及用法
... but we think the best way to relax is through exercise. ……但是我们认为最好的放松方式是通过锻炼。(教材第13页)
The river runs through our village.
这条河穿过我们的村庄。
The old man walked across the road.
这个老人走过了马路。
We must go over the mountain.
我们必须越过那座山。
【探究总结】
(1)through介词，意为“凭借；穿过”，其后可接名词、代词或动名词。
(2)through与across, over意思相近，其区别如下：
词汇 含义及用法 图解
through “通过，穿过”，表示动作是在某一空间内进行的，强调从内部穿过
across “横过，横穿”，表示动作是在某一物体的表面进行的，强调从一边到另一边
over “从……上方跨过”，多指空间范围上“越过”
【对点训练】
①通过努力学习，你可以获得好的成绩。
You can get good grades ________ working hard.
②—Where is the bookstore
—Go ________ the street and you'll see it on your left.
A. through B. across
C. cross D. over
【达标检测】
Ⅰ. 单项选择
1. Thirty-five ________ of the students ________ far from school.
A. percent; lives B. percent; live
C. percents; lives D. percents; live
2. —How do you learn English, Toby
—I often practice English ________ talking ________ my American friends.
A. in; to B. by; of
C. by; with D. with; with
3. ________ she is only five years old, ________ she can almost do all the housework.
A. Although; but B. Although; /
C. Although; so D. But; /
4. —Do you know the answer ________ this question
—Sorry, I don't know.
A. to B. on
C. of D. with
5. I like exercise such as ________ baseball and tennis.
A. to play B. to playing
C. playing D. played
Ⅱ. 完成句子
1. 你多久玩一次电脑游戏？
How often do you ________ ________ ________？
2. 我认为放松的最好方式是跑步。
I think the best way ________ ________ is running.
3. 我们都认为“旧习难改”。
We all think “Old habits ________ ________”．
4. 他一周看三四次电视。
He watches TV ________ ________ ________ times a week.
5.对我们来说，和外教用英语交谈很有趣。
________ is interesting for us ________ ________ with the foreign teachers in English.
Section B (3a—Self Check)
【自主预习·探新知】
英汉互译，了解本课重点短语
1. 16岁的高中生 ____________
2. 超过两小时 ____________
3. 看牙医 ____________
4. 少于 ____________
5. drink juice ____________
6. teeth cleaning ____________
【合作探究·破疑难】
【要点突破】
【观察思考】
阅读下面句子，体会句中画线部分的用法
—How many hours do you watch TV every week
你一周看多少小时电视？
—None. 根本不看。(教材第16页)
None_of that money on the table is mine.
桌上没有一分钱是我的。
—Is there anyone at home 家里有人吗？
—No_one. 没有人。
—Who is in the next room 谁在隔壁？
—No_one. 没有人。
【探究总结】 　none与no one的用法辨析
none no one
可指人或物 只能指________(人/物)
其后常与of连用 其后不能与of连用
作主语时，谓语动词用单数或复数 作主语时，谓语动词用单数
常用于回答how many/much引导的特殊疑问句或含有any＋名词的一般疑问句 常用于回答who引导的特殊疑问句或含有anyone, anybody的一般疑问句
【对点训练】
①—How many birds can you see in the tree
—________. All the birds have flown away.
A. None B. No one
C. Nothing D. A few
②没有人知道如何解决这个问题。
________ ________ knew how to solve the problem.
【写作指导】
【话题分析】
本单元话题为“业余活动”，与之相关的话题作文主要体现为“健康生活”。在围绕饮食、锻炼及生活习惯等内容时必然要涉及活动的频率，描述人们的生活方式及饮食习惯。
【写作任务】
健康的生活习惯对于成长中的我们非常重要。请以How to keep healthy 为题谈谈你的看法。
提示：1. 健康饮食。 2. 锻炼身体。
3. 良好的生活习惯。
要求：1.词数80～100(标题已给出，不计入总词数)。
2.字迹工整，语言流畅，表达准确，逻辑清晰。
3. 文章内容可适当发挥。
【写前指导】
1. 人称：第一人称
2. 时态：一般现在时
3. 结构提纲：
(1)引入话题：健康很重要，那么怎样才能保持健康？
(2)提出观点：健康饮食、锻炼身体并养成良好的生活习惯。
(3)回扣主题：如果我们都这样做，保持健康很容易。
4. 语句储备：
(1)try to do sth. 　(2)It's good/bad for ...
(3)It's good to relax by doing sth.
(4)stay up late
【汇思成篇】
How to keep healthy
_____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
______________________________________________________________________________________
【达标检测】
Ⅰ. 用所给词的适当形式填空
1. How often ________ your brother ________(exercise)
2. My sister ________(drink) milk every morning and she is quite healthy.
3. Do you often go to the dentist for teeth ________(clean)
4. My grandmother likes to take exercise every day and she is ________(real) healthy.
5. My father never ________(eat) hamburgers when he was young.
Ⅱ. 单项选择
1. We'd better not eat junk food, ________ it is delicious.
A. although B. and
C. so D. because
2. —What does Linda often do in the evening
—She often ________ her homework, but she ________ TV yesterday evening.
A. do; watches
B. is doing; watched
C. does; watched
D. is doing; was watching
3. The man was so tired that he could ________ go on with his work.
A. easily B. hardly
C. nearly D. almost
4. She comes to school on time every day, and she is ________ late.
A. often B. usually
C. never D. always
5. Tom's sister is ________ and he also has a ________ brother.
A. 5 year old; 6 year old
B. 5 years old; 6 years old
C. 5-year-old; 6-year-old
D. 5 years old; 6-year-old
单元复习课
单词活用——必考单词，灵活运用
1. They have P．E. class ________(两次) a week.
2. Mrs. Dean ________(去世) half a year ago.
3. If you want to be in good ________， you should eat more ________ food. (health)
4. There're many ________ between ________ countries.(different)
5. The girl wants to be a ________(write) when she grows up.
6. We should eat more vegetables and ________(little) meat.
短语速译——高频短语，速填速记
1.几乎从不　 ____________
2. 摇摆舞 ____________
3. 至少 ____________
4. 垃圾食品 ____________
5. 多于 ____________
6. 去购物 ____________
7. 熬夜 ____________
8. 对……有好处 ____________
9. 少于 ____________
10. on weekends ____________
11. help with housework ____________
12. use the Internet ____________
13. not ... at all ____________
14. such as ____________
15. teeth cleaning ____________
句型闯关——重点句型，逐一突破
1. 你在星期天通常做什么？
________ ________ you usually ________ on Sunday
2. 他多久做一次早饭？
________ ________ ________ he make a breakfast
3. 父母想让我每天早晨锻炼身体。
My parents want ________ ________ ________ every morning.
4. 学好英语对你来说是很简单的。
________ ________ ________ for you ________
________ English well.
5. 我们班95%的学生每天早晨按时到校。
Ninety-five ________ ________ the students in our class ________ to school on time every morning.
6. 我们感到惊奇的是他没上过网。
We are ________ ________ he has never gone online.
语法专练——特别训练，专项提升
1. Miss Lin's classes are ________ interesting. I like them.
A. hardly B. never
C. seldom D. always
2. Bill is ________ late for class. His teachers all like him.
A. often B. always
C. never D. sometimes
3. Lucy is ________ thinking of others. She is a kind girl.
A. often B. always
C. never D. sometimes
4. Tina goes to the movies once_a_month. (对画线部分提问)
________ ________ ________ Tina go to the movies
5. Sue usually uses the Internet. (改为一般疑问句)
________ Sue usually ________ the Internet
6. Joe does his homework on Sundays. (改为否定句)
Joe ________ ________ his homework on Sundays.
真题演练——揭秘考点，挑战中考
核心考点揭秘
近年来各地中考考点在本单元集中体现在以下几点：
频度副词、how often等特殊疑问词的用法辨析、连词though/although、介词through及不定代词none的用法等。
1. (重庆)I could ________ hear what you said just now. Could you please say that again
A. sometimes B. always
C. hardly D. clearly
2. (福州)—________ does your father go to the fitness center
—He exercises there twice a week.
A. How soon B. How often
C. How long
3. (2014·成都)Li Ke ________ runs in the morning, for he wants to be healthy.
A. never B. often
C. hardly
4. (福州)________ my cousin is very young, ________ she can help with the housework.
A. Once; 不填 B. Though; but
C. Although; 不填
5. (镇江)Ma Yun, the Chairperson of Alibaba Group, has made much money ________ the Internet.
A. through B. along
C. across D. towards
6. (济南)—How many hours do you play computer games every week
—________. My mother doesn't allow me to do that at all.
A. Both B. Either
C. All D. None
参考答案
Unit 2　How often do you exercise
Section A (1a－2d)
【自主预习·探新知】
Ⅰ. 1. help with housework　2. hardly ever　
3. once a week　4. twice a month　5. use the Internet　6. 在周末　7. 去购物　8. 去看电影
Ⅱ. 1. How often　2. What do; do　3. What's
【合作探究·破疑难】
[要点突破]
1. [探究总结] 否定；之后；之前
[对点训练] ①hardly speaks　②hard; hardly
2. [探究总结] long; soon; many times
[对点训练] ①How often　②How long　③B
[达标检测]
Ⅰ. 1. goes　2. exercises　3. once　4. times　5. to go
Ⅱ. 1－5　ABDDA
Section A (Grammar Focus－3c)
【自主预习·探新知】
Ⅰ. 1. watch TV　2. play soccer　3. at least　4. 熬夜到很晚　5. 吃顿健康的早餐　6. 做运动
Ⅱ. 1. help; with housework　2. How often; Twice a　3. hardly ever　4. Do; play
【合作探究·破疑难】
[要点突破]
[探究总结] 句首
[对点训练] ①Maybe　②A
[语法聚焦]
[探究总结] (2)①之后；之前；how often
[对点训练] ①How often　②B　③B
[达标检测]
Ⅰ. 1. swimming　2. Does; get　3. drinks　
4. healthy　5. sleep
Ⅱ. 1－5　DABBC
Section B (1a－1e)
【自主预习·探新知】
1. junk food　2. want me to drink milk　
3. be good for　4. 好习惯　5. 喝咖啡
【合作探究·破疑难】
[要点突破]
1. [对点训练] ①to go　②wants me to play
2. [对点训练] ①is bad for　②dancing　③good to
[达标检测]
Ⅰ. 1. junk　2. sleeps　3. coffee　
4. vegetables　5. health
Ⅱ. 1－5　ADADA
Section B (2a－2e)
【自主预习·探新知】
Ⅰ. 1. 做运动　2. 一点也不　3. ……的答案　4. online　5. as
Ⅱ. 1. Here are　2. are surprised; ninety percent; go online　3. It is good to relax
4. the best way to relax; through exercise
【合作探究·破疑难】
[要点突破]
1. [探究总结] (2)不能
[对点训练] ①C　②Although he worked hard
2. [对点训练] ①through　②B
[达标检测]
Ⅰ. 1—5　BCBAC
Ⅱ. 1. play computer games　2. to relax　
3. die hard　4. three or four　5. It; to talk
Section B (3a－Self Check)
【自主预习·探新知】
1. 16-year-old high school student　
2. more than two hours　3. go to the dentist　4. less than　5. 喝果汁　6. 刷牙
【合作探究·破疑难】
[要点突破]
[探究总结] 人
[对点训练] ①A　②No one
[写作指导]
One possible version：
How to keep healthy
It is very important to keep healthy. But do you know how to keep healthy
Firstly, breakfast is necessary. It gives us energy for the morning. We must also have the right kind of food. Try to eat more fruit and vegetables, but less junk food. Don't forget to wash your hands before meals. Secondly, it's good for us to take exercise. Exercise will keep us active and strong. Thirdly, I think staying up late is bad for our health. We should go to bed early and get up early. Lastly, it's good to relax by listening to music or chatting.
I'm sure if we do like that, we can keep healthy easily.
[达标检测]
Ⅰ. 1. does; exercise　2. drinks　3. cleaning　
4. really　5. ate
Ⅱ. 1－5　ACBCD
单元复习课
[单词活用]
1. twice　2. died　3. health; healthy
4. differences; different　5. writer　6. less
[短语速译]
1. hardly ever　2. swing dance　3. at least　
4. junk food　5. more than　6. go shopping　7. stay up　8. be good for　9. less than　
10. 在周末　11. 帮助做家务　12. 使用因特网　13. 一点也不　14. 例如　15. 刷牙
[句型闯关]
1. What do; do　2. How often does　3. me to exercise　4. It's very easy; to learn　
5. percent of; get　6. surprised that
[语法专练]
1—3　DCB　4. How often does　
5. Does; use　6. doesn't do
[真题演练]
1. C　考查副词辨析。句意：刚才我几乎没听见你所说的话。请你再说一遍好吗？sometimes“有时”；always“总是；一直”；hardly“几乎不”；clearly“清楚地”。由后一句话可知“我”没听清“你”说的话，故选C。
2. B　考查疑问词组的辨析。句意：——你爸爸多久去健身中心一次？——他一周在那里锻炼两次。how soon“还要多久”，对“in＋一段时间”提问；how often“多久一次”，对频率提问；how long“多长时间”，对“for＋一段时间”提问。故选B。
3. B　考查副词辨析。由后半句“因为他想要健康”可知，李可早上经常跑步。never“从不”；often“经常”；hardly“几乎不”。故选B。
4. C　考查连词的用法。句意：虽然我的堂妹很小，但她能帮助做家务。前后句之间为转折关系，因此应用although或though，但它们均不与but连用，故选C。
5. A　考查介词的辨析。句意：马云，阿里巴巴集团主席，通过网络赚了许多钱。through“通过”；along“沿着”；across“穿过”；towards“朝，向”。故选A。
6. D　考查代词辨析。句意：——每周你打几个小时电脑游戏？——没有。我母亲根本不允许我打电脑游戏。both“两者”； either“(两者之中)任何一个”；all“所有的”；none“(不确定数目中)一个也没有”。故选D。