1 . He insisted on ________ (send) to hospital. (所给词的适当形式填空)

2 . He planned to learn kung fu in the summer holidays so that he can defend himself against being ________ (攻击). (根据汉语提示单词拼写)

4 . You are fortunate enough to escape ________ (kill) in the accident. Now, the ________ (escape) driver has been arrested. (所给词的适当形式填空)

5 . The bus was due ________ (arrive) at 5: 00 p. m., but it arrived one hour late due to   ________ (hold) up by the heavy fog. (所给词的适当形式填空)

6 . It is highly important to prevent the environment from_________.

A．polluting

B．polluted

C．to be polluted

D．being polluted

7 . Large quantities of animals escaped _________ (kill) in the big fire. (所给词的适当形式填空)

8 . ______(examine) once every two years, whether it is a car, a bus or a lorry, is the rule that all drivers must obey in our country. (所给词的适当形式填空)