9年级英语人教版Unit 6 When was it invented? Section B 课后作业（含答案）

课时练习
Unit 6 When was it invented
Section B (1a～1e)
一、根据句意及首字母提示完成单词。
1．I don't like lemons because they're too s 　.
2．The chips taste c________， and even the old enjoy them.
3．Someone took my umbrella by m________．
4．Every morning，there are many c 　 shopping in the supermarket.
5．Eating too much s________ food isn't good for our health.
二、用所给单词的适当形式填空
6．It ________(believe) that aliens live in some places far from the earth.
7．It's said that tea is an ________(accident) invention in history.
8．Dumplings and some other traditional Chinese food ________(trade) between different countries.
9．His mother is ________(boil) water in the kitchen.
10．Tea ________(bring) to Western countries during the 19th century.
三、单项选择。
11.—Jack，what's the matter with you
—I can't find my bag.Maybe someone took it mistake.
A．for　　　B．at　　　C．of　　　D．by
12.Our class won the first in the school basketball
match.The good news made all of us .
A．sad B．happy C．happily D．happiness
13.My little sister isn't to look after herself.
A．young enough B．enough young C．old enough D．enough old
14.They don't like the potato chips because they aren't enough.
A．big B．crispy C．sour D．sweet
15. Last year Huai'an Flyover (高架) .Now it brings much convenience to people.
A．finished B．finishes C．is finishing D．was finished
四、语法填空
The first robots were invented in the 1920s. Since then robots 16.________(appear) in many science fiction films. In some films, robots can think like human beings, and even they are 17.________(clever) than we expect.
In real life, people 18.________(main) use robots in factories. They do some dangerous and difficult jobs for humans.
Robots also help disabled people, for example, blind people. Today many blind people have a guide dog 19.________(help) them. In the future, guide dogs might be robot dogs.
One kind of robot guide dog has wheels. It moves in front of the owner. It is very clever. It knows the speed of its owner's walk. The owner wears a special belt. This belt sends instructions to the owner 20.________ the dog, such as “Stop here”， “Turn left” or “Turn right”．
In the United States, another kind of robot helps disabled people to take care of 21.________(they) in their daily life. The robot hears the sound of its owner's voice. It follows instructions such as “Turn the page” or “Make a cup of coffee”．
Robots 22.________(use) in American hospitals, too. They can do simple jobs. At one hospital, for example, a robot takes meals from the kitchen to 23.________(patient) rooms. It never gets lost 24.________ this robot has a map of the hospital in its computer memory.
25．________ robots can help people in many different ways, they will never take the place of humans.
答案;
一、
1. our 2. rispy 3. istake 4. ustomers 5. alty
二、6.is believed　 7.accidental 8．are traded　 9.boiling 10．was brought
三、
11-15 DBCBD
四、16.have appeared　
17.cleverer
18．Mainly
19 .to help
20.from
21. Themselves
22.are used
23．patients'
24.because
25．Though/Although