考点演练
一、用方框中所给词的适当形式完成句子。

1. It is convenient ______ us to buy things online.
2. — How do you feel after watching the documentary Amazing China?
— Well, I think it is lucky for us ______ in this great country.
3. ______ is our duty to protect the environment.
4. It is helpful ______ John to donate his money to charities.
5. It is wise of Linda to make up her mind ______ to play an instrument.
6. It’s difficult for her ______ the task within so little time.
7. It is necessary ______ us to take action to reduce the air pollution.
8. It’s rude ______ the boy to shout at his mother.

一、1. for 2. to live 3. It 4. of 5. to learn 6. to finish 7. for 8. of

二、同义句转换。
1. Playing with fire is dangerous.
It is ______ ______ ______ with fire.
2. Sue smiles and greets me every morning.
She is friendly.
It’s ______ ______ Sue ______ smile and greet me every morning.
3. It’s necessary that we read English every day.
It’s ______ ______ ______ ______ read English every day.
4. You are kind to tell me the news.
It’s ______ ______ you ______ ______ me the news.
5. Taking care of our environment is very important.
______ very important ______ ______ care of our environment.
6. To work out the problem is difficult for me.
It’s ______ ______ ______ ______ the problem.
7. You’ll lose your way easily in such a big city.
It’s ______ ______ you ______ ______ ______ in such a big city.
8. The girl often gives her seat to someone in need. She is nice.
______ ______ ______ the girl ______ ______ her seat to someone in need often.
9. Eating healthily is important for each of us.
______ ______ important ______ each of us ______ ______ healthily.
10. It’s meaningful that we should do something for the disabled.
It’s meaningful ______ ______ ______ do something for the disabled.

二、1. dangerous to play 2. friendly of; to 3. necessary for us to 4. kind of; to tell 5. It’s; to take 6. difficult for me to work out 7. easy for; to get lost 8. It’s nice of; to give 9. It is; for; to eat 10. for us to