27　Unit 9 It's important to have good habits. 课时分层训练(十八)　 九年级英语 鲁教版

课时分层训练(十八)　
Unit 9　It's important to have good habits．
Section B
知识点一　need的用法
1．I need C with my parents．
A．talk B．talking
C．to talk D．talked
2．—You B take the subway to the airport，for I can drive you there directly．
—That's very kind of you．
A．can't B．needn't
C．mustn't D．shouldn't
解析：考查情态动词辨析。句意：——你不必坐地铁去机场，因为我可以直接开车送你去。——你真是太好了。can't不能，不会；needn't不必；mustn't禁止；shouldn't不应该。由后半句“我能直接开车送你去”可知，对方不必坐地铁，故选B。
3．Do we need (需要) eat more healthily
知识点二　give up的用法
1.—What abilities should a dog trainer have
—I think he should be responsible and never D ．
A．give away B．give out
C．give back D．give up
解析：考查动词短语辨析。句意：——训狗师应该具备什么能力？——我认为他应该具备负责和从不放弃的能力。give away捐赠；give out分发；give back归还；give up 放弃。根据“be responsible(负责任)”推知后面是“从不放弃”。故选D。
2．Never give up doing (do) everything．
3．吉姆告诉我不要放弃我的梦想。
Jim told me not to give up my dream．
知识点三　without的用法
1．Please bring Ms．Steen to the welcome party C telling her so that she can be surprised．
A．about B．from
C．without D．for
解析：考查介词辨析。句意：请事先别告诉斯汀女士并直接带她去欢迎晚会，这样会令她感到很惊喜。介词without意为“无；没有”，在此表示伴随状态。故选C。
2．John hurried to school without having (have) breakfast．
3．人没有水不能生存。(汉译英)
People can't live without water．
知识点四　have trouble (in) doing sth的用法
1．You could ask the teacher for help when you have trouble D English．
A．learn B．learned
C．to learn D．learning
2．Mike has trouble solving (solve) the math problem．
3．Some kids had trouble following the rules．(同义句转换)
Some kids had problems/difficulties following the rules．
知识点五　keep的用法
1．Today，we must continue working B our skies blue，waters clean and lands clear．
A．keep B．to keep
C．keeping
解析：考查非谓语动词。句意：今天，我们必须继续努力，保持我们的天蓝、水清、地清。此处用动词不定式表示目的，故选B。
2．I go swimming every day in order to keep healthy．
3．Amy wants to keep (饲养) a pet dog．
4．我有记日记的好习惯。
I have a good habit to keep a diary．
阅读理解
Teenagers need eight to ten hours of sleep per night．However，in adolescence(青春期)，changes to the body's sleep cycle make it difficult for teens to fall asleep early．Many cannot fall asleep until 10：30 p．m．or even later and most of them will feel sleepy if they have to get up too early．
Scientists recommend that both middle and high schools begin no earlier than 8：30 a．m．Later school start times support the natural needs of teenagers and increase their sleeping time．
Here are some other benefits of later school start times：
More time for a healthy breakfast
When running late in the mornings，students are likely to go without breakfast．With an empty stomach，one finds it difficult to focus(集中) in class．When they are always in a hurry，students may form unhealthy eating habits．
With extra time before going to school，students can eat a well balanced breakfast and focus more on learning．
Fewer behavioral(行为的) problems
Teens experience mood changes as a common result of this special period of life．Less sleep may cause worries，stress and unhappiness．
When they get enough sleep，students are calm and peaceful and their moods do not change suddenly．They're less likely to feel worried，unhappy or get angry．For parents，children with more sleep are easier to live with．
Better performance(表现) in study
Sleep loss hurts attention，memory and brain development．Students with less sleep have difficulty paying attention in class and are likely to have lower grades．Students with enough sleep can be more energetic during the day and more willing to learn．They are also less likely to fall asleep in class and more able to understand what they learn．
In conclusion，starting school later helps students get a better night's sleep．It improves their chances of eating，behaving and performing better．
(　C　)1．According to the passage，what may cause teenagers to stay up
A．Their low grades．
B．Their empty stomachs．
C．Their body's sleep cycle．
D．Their heavy homework．
解析：细节理解题。根据“However，in adolescence(青春期)，changes to the body's sleep cycle make it difficult for teens to fall asleep early．” 可知，青少年身体睡眠周期的变化使他们难以入睡。故选C。
(　B　)2．How can sleep loss influence students' study
A．It gives them much energy．
B．It does harm to the brain．
C．It saves more time for study．
D．It improves their memory．
解析：细节理解题。根据“Sleep loss hurts attention，memory and brain development．Students with less sleep have difficulty paying attention in class and are likely to have lower grades．”可知，睡眠不足影响孩子的大脑发育。故选B。
(　D　)3．What's the writer's main purpose in writing this passage
A．To explain reasons for students' stress．
B．To describe bad habits caused by sleep loss．
C．To discuss scientists' research on healthy food．
D．To introduce benefits of later school start times．
解析：写作意图题。通读短文内容可知，作者写作的意图是介绍推迟学生上学时间的一些好处。故选D。
(　A　)4．In which part of the website can you probably find this passage
A．Education． 　　 B．Fashion．
C．Sports． 　　 D．Technology．
解析：推理判断题。通读全文可知，本文讲述了推迟学生上学时间的一些好处，是关于学生教育的，最有可能在“教育网站”看到这篇文章。故选A。
【创新运用】
书面表达
假如你是李磊，你的网友彼得(Peter)给你写了一封邮件，向你倾述自己过于肥胖而导致身体不健康的烦恼。请你根据以下提示信息用英语给他回一封电子邮件，向他提一些保持健康的好建议。
提示：
1．饮食健康；
2．经常锻炼身体；
3．……
要求：
1．可以适当发挥，以使行文连贯；
2．词数80左右(开头和结尾已给出，不计入总词数)。
Dear Peter，
I'm sorry to hear that you're worried about your health．　I'm also glad to help you to keep healthy．Here are my suggestions：
You need to eat more healthily．Eating more vegetables and fruit is good for your health．Don't eat many snacks or too much meat，or you'll be much heavier．Give up junk food．It's important for you to exercise．It can help you keep fit．You can run for twenty minutes in the morning or play soccer with your friends after school．It's good to get enough sleep．You should go to bed early and get up early．
I hope you'll get better soon．　
Yours，
Li Lei
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