There was a sudden burst of light 　　　　 a terrible noise.

　 A.following 　 B.to follow　　 C.followed　　 D.followed by

When he realized the police had seen him, the man_____the exit as quickly as possible.

A. made up       　 B. made for　　 C. made out      　 D. made off

—Alice, you look puzzled. Have you understood it?

—Yes, I 　　　　another problem just now.

A. have thought of　　 B. am thinking of

C. had thought of　　　 D. was thinking of

The number of foreign students attending Chinese universities ________ rising steadily since1990.

A. is　　　　 　　　 B. are　　　　 　　　 C. has been　　　　 D. have been

We will go there on foot 　　　　　　 by bus. What about you?

A. instead　　　　 B. instead of　　　 C. without　　　 D. but

He simply repeated this year's work. He's the sort of boy who _____ to anyone whatever failures he'a had in whatever he does.

　　A.doesn't mention 　　　　　　B.hadn't mentioned

　　C.didn't mention 　　　　　　 D.hasn't mentioned

It could be judged from her eyes　　　　 she was very satisfied with her performance.

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

The __________( 起源 ) of some words are unknown.

How about the two of us ______ a walk down the road?

　 A. to take　 　 B. take　　　 C. taking　　 D. to be taking

—When did it begin to snow?

—It started ____ the night.

A. during　　　　　　 B. by　　　　　　　 C. from　　　　　　 D. at