Paper and printing ________ in China.

A. were both invented B. was invented C. are both invented D. is invented

Yesterday I took a man’s bag ________, and he was very angry with me.

A. by mistakes B. by mistake C. with mistake D. with mistakes

The lab ________ about five years ago.

A. built B. is built C. was built D. has been built

The customer thought the potatoes ________.

A. weren’t thin enough B. aren’t thin enough

C. aren’t enough thin D. weren’t enough thin

He ________ the potato chips until they were crispy.

A. stopped to cook B. didn’t stop to cook

C. stopped cooking D. didn’t stop cooking

根据所给汉语完成英语句子。

1.它们是由于一次错误而被发明出来的。

They were invented ________ ________.

2.今天你烧的鸡蛋汤已经够咸的了，不用再放盐了。

The soup you cook today is ________ ________. Don’t put any salt into it.

3.什么事让你这么高兴？ What ________ you so ________?

4.直到他明天回来我才能告诉他。I won’t tell him ________ he ________ back tomorrow.

5.冰不够厚，不能滑冰。The ice wasn’t ________ ________ for you to skate on.

句型转换。

1.A cook invented potato chips by mistake. (改为被动语态)

Potato chips _________ _________ by a chef by mistake.

2.He sent back his plate of fried potatoes because he said they were too thick.

(就画线部分提问)

________ ________ he ________ back his plate of fried potatoes?

3.He cooked them until they were crispy. （改为同义句）

He didn’t ________ ________ them until they were crispy.

4.He thought the customer would hate what he cooked. (改为同义句)

He ________ ________ the customer would like what he cooked.

5.How cool the story was!（改为同义句）________ ________ cool story!

用所给单词的适当形式填空，使短文内容完整通顺。

Did you know that potato chips 1. (invent) by mistake? Chips were invented by a chef 2. (call) George Crum in 1853. George Crum 3.(cook) them for a long time until they 4. (be) crispy. And he sprinkled lots of salt on them so they were really 5. (salt).

根据汉语意思完成句子

1.昨天我偶然遇见了我的数学老师。

I met my math teacher ________ ________ yesterday.

2.我将把这块蛋糕分成四份。

I will ________ this cake ________ four parts.

3.没有什么能够阻止我们今天下午去游泳。

Nothing can ________ us ________ ________ swimming this afternoon.

4.同时，我们可以玩电脑游戏。

________ ________ ________ ________， we can play computer games.

5.尽管NBA比赛是最著名的，但CBA比赛正变得更受欢迎。

________ NBA games are the most famous, the CBA games are becoming ________ ________.

6.昨天晚上突然发生了地震。

________ ________ ________ ________， the earthquake ________ last night.

The first robots were invented in the 1920s. Robots have_____in many American films. In some films, they are stronger, _____ and cleverer than people. In real life, robots are mainly used in _____. They do some dangerous and difficult jobs for humans. Robots also help _____people, for example, blind people.

Today many blind people have a guide dog to help them. In the future, guide dogs might be _____dogs. One kind of robot guide dog has wheels. It moves in front of the owner. It is very clever. It knows the _____ of its owner's walk. The owner wears a special belt. This belt _____instructions to the owner from 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 _____ in their daily life. Robots are also used in American hospitals. They can do simple jobs. At one hospital, for example, a robot takes meals from the kitchen to a patient's room. It never _____ because this robot has a map of the hospital in its computer memory. ______ robots can help people in many ways, they will never take the place of humans.

1.A. created B. appeared C. used D. produced

2.A. faster B. slower C. more careless D. weaker

3.A. hospitals B. restaurants C. houses D. factories

4.A. unhappy B. successful C. disabled D. talented

5.A. robot B. toy C. paper D. real

6.A. shape B. size C. speed D. shoe

7.A. accepts B. sends C. changes D. follows

8.A. themselves B. ourselves C. yourselves D. itself

9.A. gets back B. gets over C. gets up D. gets lost

10.A. Though B. But C. Because D. Until