Be careful, _____you’ll fall off.

A. so　　 B. as　　 C. and　　 D. or

Danny 　　　　 hard for long to realize his dream and now he is popular.

A. works　　　 B. is working　　　　　 　 C. has worked　　　 　 D. worked

I didn’t _______ him to become a successful writer.（ ）

A. wish　　　　　 B. expect　　　　 C. hope　　　　　 D. like

We _____ last night, but we went to the concert instead.

　 A. must have studied　 B. might study　　 C. should have studied　　 D. would study

Mark was a student at this university from 1999 to 2003, __________ he studied very hard and was made Chairman of the Students’ Union.

　 A. during which time　　　　　 B. for which time

　 C. during whose time　　　　　 D. by that time

The child enjoyed _____ up the wooden bricks then knocking them down.

　 A. adding　 B. pushing　 C. piling　 D. forming

Next month the city will open a new park to honour those _____ died in the terrible disaster.

A. who　　　 B. that　　　　　　 C. which　　　　　　 D. they

As a film star she was a success, but as a wife she was ________ failure, so their marriage ended in ________ failure.

A. /; /　　　　　 B. /; a　　　　　　 C. a; a　　　　　　 D. a; /

There are four underground lines in Beijing, and several lines are under _______(建设)