It was in the lab _______ was built three years ago _______ the students made the experiment.

[　　]

________ comedians have in common _______ the players in a comedy is their use of word play.

[　　]

He _______ himself with books, _______ you killed time by playing computer games.

[　　]

A. entertained, as

B. entertained, when

C. amused, while

D. amused, when

--I'm sorry I won't be able to go with you.

--But you _______ us you _______ .

[　　]

A. tell, are going to

B. told, are going to

C. told, were going to

D. tell, were going to

--What about going to dinner with us this evening?

--I'd _______ , but I have a lot of work to do.

[　　]

--What made his mother ______ mad with joy?

--The news of his success.

[　　]

-- _______ the most important thing in your job?

--Making people laugh.

[　　]

A. Do you think what

B. Do you think what is

C. What do you think

D. What do you think is

The monitor of each class was called for, me ________ .

[　　]

There are more men smoking, ________ women.

[　　]

A. comparing with

B. comparing to

C. are compared with

D. compared to

Not until all the fish died in the river _______ how serious the pollution was.

[　　]

A. did the villagers realize

B. the villagers realized

C. the villagers did realize

D. didn't the villagers realize