It is worth ____ considering the problem.

A.when B. as C. while D. since

He stood there, ____ unable to say anything.

A.shocking B. being shocked C. shocked D. shockingly

I asked my boss for a month's holiday and, ____, she agreed.

A.what's more B. that is to say C. believe it or not D. in other words

She felt very ____ when her mother forgot her birthday.

A.deserted B. desperate C. misled 　　　　　 D. disappointed

You can take anything from the shelf and read, but please ____ the books when you've finished with them.

A.put on B. put down 　　　　C. put back D. put off

The girl is a ____ with languages.

A.genie 　　　　　　　　　　　 B. genesis 　　　　　　　　 C. genuine 　　　　　　　　 D. genius

It is ____ for a person in his position to make such a mistake.

A.rare B. scarce C. usual 　　　　　　　　　　　　　 D. rarely

Whether an operation should be performed in this case ____ very much on the patient's general condition.

A.relies 　　　　　　　　　　　 B. counts 　　　　　　　　 C. concentrates 　　　　 D. depends

____ a while the train stopped at a station.

A.On 　　　　　　　　　　　　　 B. At 　　　　　　　　　　　　 C. For 　　　　　　　　　　 D. After

John was dressed in brown ____ Mary was dressed in blue. 　

A.when 　　　　　　　　　　　 B. as 　　　　　　　　　　　　 C. while 　　 　　　　　　　　　　 D. then