While Helen __________ the guitar, her mother came in.A．was playingB．is playingC

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While Helen __________ the guitar, her mother came in.

A．was playing

B．is playing

C．played

D．plays

答案

解析

while引导时间状语从句，常用进行时态。

举一反三

She asked if I ________ to Beijing tomorrow. If I ________, she will go with me.

A．go; go

B．go; will go

C．will go; go

D．will go; will go

题型：不详难度：| 查看答案

If it rain tomorrow, I visit my uncle

A．doesn’t; will

B．does ;/

C．/;will

D．does; will

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I don’t know if it _____tomorrow. If it ____, I will stay at home.

A．will rain, rains

B．rains, will rain

C．will rain, will rain

D．rained, rains

题型：不详难度：| 查看答案

We will go climbing _______ it ________ tomorrow.

A．if, rains

B．if, will rain

C．unless, rains

D．unless, will rain

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We will go to the mountains,if it______this Saturday.

A．doesn’t rain

B．won’t rain

C．isn’t raining

D．didn’t rain

题型：不详难度：| 查看答案