9.　　　　 Nothing can prevent the child to risk climbing that tall tree.

8.　　　　 You should review your lessons instead of watching TV tonight.

7.　　　　 He is an experienced driver and he is used to driving in all kinds of weather.

6.　　　　 You’d better not tell him the bad news now.

5.　　　　 He devoted his life to studying spaceships.

4.　　　　 How much does the coat cost?

3.　　　　 How important it is for students to learn a foreign language!

2.　　　　 He doesn’t like coffee at all, but he prefers tea.

1.　　　　 His uncle used to live in the country. Now he lives in the city.

100. 应该采取行动来阻止黑客侵犯我们的电脑系统。(prevent)

Keys: