Mary suggests that we _______at the meeting as early as possible.

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I think that vegetables are good food because they _______ lots of vitamins.

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With all the footprints _______by the _______rain last night, the escaped prisoner could never be found.

[　　]

A．wiped off; pouring

B．wiping away; pouring

C．wiped out; poured

D．wiped; poured

You should try to get a good night's sleep, _______ much work you have to do.

[　　]

The WTO can't live up to its name ________it doesn't include a country that is home to one-fifth of mankind.

A.as long as    B.while    C.if    D.even though

Susan _______out _______the door opened and in came three strangers.

[　　]

A．was just to go; while

B．just went; as

C．was just going; as soon as

D．was just about to go; when

Population in that area has increased ________ 10 percent this year.

[　　]

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

That's an unpleasant thing to say about your father after _______ he's done for you.

[　　]

The thief stole the lights, _______ the stairs even darker.

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