一、词汇运用
1. Our planet is becoming more and more (pollute). How can we stop it?
2. Of all the vegetables, I think tomato is the (tasty) and healthiest.
3. She was looking at three (strange) — a girl with beautiful red hair and big blue eyes, and two very good-looking boys.
4. Smoking can increase the (风险) of developing heart disease.
5. There is no (疑问) that all of you will pass the exam.
6. It is important for you to remember these grammar (规则).
7. The (百分比) of girls in engineering has greatly increased.
8. Before taking action, we need to think twice about how many (不利条件) there are.

1. polluted 2. tastiest 3. strangers 4. risk 5. doubt
6. rules 7. percentage 8. disadvantages

二、单项选择
() 1.The instrument EyeHarp is specially designed disabled people to play music with eyes.

A.in
B.as
C.for
D.over

1.C

() 2.You can get the best result if you the experiment (实验) under the expected conditions.

A.carry on
B.carry out
C.carry with
D.carry away

2.B

() 3.— How long will the meeting last? — Until an agreement .

A.reaches
B.will reach
C.will be reached
D.is reached

3.D

() 4.— Sorry, George lost your book!
— Forget it. , he didn't mean to do so.

A.After all
B.In all
C.First of all
D.Above all

4.A

() 5.— What did your son say to you? — He asked me .

A.how the life will be like in 500 years
B.whether he could play mobile games
C.what's the matter
D.that we would have dinner outside

5.B

三、完成句子
1. 毕竟,大城市的生活成本不低。
, the living cost in big cities is not low.
2. 让我们来谈谈如何开展这次调查。
Let's talk about the survey.
3. 你知道四十年前我们的生活是什么样子的吗?
Do you know forty years ago?
4. 我们想知道未来的航天器是否会以光速飞行。
We wonder if the spacecraft in the future.

1. After all 2. how to carry out
3. what our life was like 4. will travel at the speed of light

四、综合填空
Look up at the sky at night. (1) can you see? Before electric lights, people could often see about 2 500 different stars. Now, light (2) (fill) the skies over our cities. This (3) (call) light pollution. Because of it, people in cities can often only see about ten stars.
Most of the time, light helps us. We can see because of it. It gives (4) (plant) energy. But light isn't always good. Sometimes we need darkness (5) (rest). One hundred years ago, we had those times of dark. Now the night is like day. Some scientists are (6) (worry) that this light may influence our health. These scientists are studying the effects of light pollution.
Other scientists are finding ways to stop light pollution and make our lives (7) (good). For example, many street lights now have covers. The covers focus (聚焦) the light towards the ground. They stop the light from (8) (go) up into the sky. They also save energy. The covers are (9) small change, (10) they can still have a positive (正面的) effect.

1. What 2. fills 3. is called 4. plants 5. to rest
6. worrying/worried 7. better 8. going 9. a
10. but