5.What can be inferred from the author' s example of the Norwegian stuntman?

A.　　　　　 Sometimes an accident can occur to a stuntman.

B.　　　　　　 The percentage of serious accidents is high.

C.　　　　　 Parachutes must be of good quality.

D.　　　　　 The cliff is too high.

4.Which of the following is the main factor (因素) of a successful performance?

A.　　　　　 Strength. B. Exactness. C. Speed. D. Carefulness.

3.When a stuntman falls from a high building, ______.

A.　　　　　 he needs little protection

B.　　　　　　 he will be covered with a mattress

C.　　　　　 his life is endangered

D.　　　　　 his safety is generally all right

2.Stuntmen earn their living by ______.

A.　　　　　 playing their dirty tricks

B.　　　　　　 selling their special skills

C.　　　　　 jumping out of high windows

D.　　　　　 jumping from fast moving trains

1.Stuntmen are those who ______.

A. often dress up as actors

　B. prefer to lead dangerous lives

C. often perform seemingly dangerous actions

D. often fight each other for their lives