I’m afraid these water _______（管子）may burst during the cold weather.

______, it began to run unexpectedly.

　　A. While cleaning the machine B. To clean the machine

　　C. He was cleaning the machine D. While he was cleaning the machine

The captain determined to be with the ship forever and never____ to disappointment even when the ship sank.

A. gave off　　　　 B. gave over　　　　 C. gave way　　　　 D. gave up

Which sentence is wrong?　

A. Tom suggested our working the land for two weeks during the summer holiday.

B. The physician suggested I lie in bed for some days and quit school for a while.

C. Karen made a suggestion that all the money must be kept in a bank.

D. The clouds suggests big white pillows to me.

To do a bit for the motherland, ______.

　　A. working hard is necessary     　 B. to learn a foreign language is needed

　　C. it is important to master science D. one should serve the people whole-heartedly