She is always ready to help people in trouble because she thinks it a　　　

　　 A. business　　　 B. reward　　　 C. pleasure　　　　　 D. favor

_____ of the students who took part in the military training is 450.

A. A number　　　　　 B. A lot　　　 C. Lots　　　　 D. The number

Between the two parts of the concert is an interval, _______ the audience can buy ice-cream.

A. when　　　　 B. where　　　 C. that　　　　　 D. which

— Would you rather come on Friday or Saturday?

　 — ____　　

　 A. Yes, of course.　　 　　　　 B. The other is better.

　 C. What’s the matter?　　 　　 　　D. Either would suit me.

When I got back home I saw a message pinned to the door ___________ “Sorry to miss you; will call later.”

A. read　　　　 B. reads

C. to read　　　 D. reading

It was only with the help of the local guide ________.（ ）

A. was the mountain climber rescued      　 B. that the mountain climber was rescued

C. when the mountain climber was rescued  D. then the mountain climber was rescued

She was _________(授予) a medal for her bravery.

He inspired many young people_________________（参加体育运动）. (take)

I ______ understanding some aspects of America.

They have a good knowledge of English but little ____ they know about German.

A. have 　 B. do　　　　 C. had 　　　　　 D. did