— How long _____ at this job ?

— Since 1990

A. were you cmployed　　　　 B. have you been employed

C. had you been employed　　　 D. will you be employed

Output is now six ________ it was before liberation.

　 A. what times　 B. times what　 C. times of which D. which times

Human facial expressions differ from those of animals in the degree ______ they can be controlled on purpose.

A. with which 　　 　　B. to which　　　 　　　　 C. of which　　 　　　 D. for which

There were a lot of people standing at the door and the small girl couldn’t get _______      

A. between   　 B. through   　　 C. across    　　　 D. beyond

As time went on, Einstain’s theory _____ to be correct.

A. proved 　 B. proves　 C. is proved 　 D. was proved

How much do you 　　　for mending one light?　　　

A. spend　 B. cost　 C. charge　 D. take

Before the 1850’s, the United States had a number of small colleges, most of them ____ from colonial days.

A. was dated　　　 B. is dated　　

C. is dating　　　 D. dating

The train　　 arrive at 1:30, but it was an hour late.?

A. was about to　　 B. was likely to ? C. was certain to D. was supposed to?

We haven’t seen each other since we graduated from college three years ago, but ______we communicate on line.

A. little by little　 B. now and then　 C. here and there　 D. by and by

China came up to the sixth place in the world _____ economic aggregate(经济总量)。

A. instead of　 　　　 B. in favor of　 C. in exchange for D. in terms of