The ship sank, ____ are foreigners.

A.most of them on the board 　　　　　　　　　　　　　　　　 B. most of whom on the board

C. most of them on board 　　　　　　　　　　　　　　　　　　 D. most of whom on board

You'd better ____ how you managed to do it, or we won't let you go.

A.clarify                            B. to clarify                 C. expand                   D. speak

Don't ____ before you take some medicine. 

A.forget shaking the bottle                               B. forget to shake the bottle

C. forget that you shake the bottle                            D. forget about shaking the bottle

He uses a letter of introduction as ____.

A.identifiable                      B. identification                   C. identify                   D. identity

The animals' antics of the zoo's made all people visiting ____.

A.interesting B. entertained C. amused 　 D. normal

The young fellow looked ____ in his tight blue coat.

A.interesting                       B. surprised                 C. ridiculous                       D. naked

There was an embarrassing silence after her indiscreet remark but she was able to ____.

A.laugh at it B. laugh it out 　C. laugh it off 　　　 D. laugh off it

Passengers are waiting ____.

A.on the board B. to the board 　　　　　 C. to board D. at board

The whole incident would be ____ if it were not so serious.

A.laughing B. laughingly 　C. laughable D. laughter

The government is accused of using ____ tactics(战术).

A.delay 　　　　 B. delaying C. delayed D. being delayed