I. 用括号中所给单词的适当形式填空
1. Turn off the tap when you brush your ________（tooth）.
2. David said nothing, but ________（simple）nodded, as if understanding perfectly.
3. We walked down some stone ________（step）to the beach.
4. One more person wouldn’t make any ________（different）to the arrangements.
5. I think our environment is changing for ________（bad）, so it is time for every one of us to get started to go green.

I. 1. teeth 2. simply 3. steps 4. difference 5. worse

II. 用方框中所给动词的适当形式完成句子

1. A hole should ________ ________ before you plant a tree.
2. The student ________ ________ because he didn't do his homework.
3. —________ children under 18 ________ to enter the Internet bar?
—No.
4. The driver ________ ________ if he breaks the traffic rules.
5. Old things should be ________ ________ into different bins.

II. 1. be dug 2. was punished 3. Are; allowed 4. will be fined 5. separated

III. 用方框中所给单词或短语的适当形式完成句子

1. Hangzhou Asian Games ________ ________ on 23 September, 2023.
2. Doctor Li ________ ________ ________ when the earthquake started.
3. We can't cut in on others, and we must wait ________.
4. Project Hope ________ ________ in 1989. It works to help children have good education.
5. Millie tells me she always feels sick as soon as she is ________ ________.
6. The young should avoid ________ ________ their parents for a living.
7. We have enough time ________ ________ the leaflets on time.
8. ________ ________, she is more like a fashion model.
9. Tony is ________ ________ boy in our club. He can choose the right way every time.
10. These students work hard and they know how ________ ________.

III. 1. took place 2. was doing an operation 3. politely 4. was set up 5. on board 6. depending on 7. to hand out 8. In some ways 9. the wisest 10. to achieve their dreams