单项选择题

He is very helpful. What he did for us made the job much easy.()

A．done
B．doing
C．to do
D．being done

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单项选择题
It () for two hours and the ground is too wet to play on, so the match has been put off.

A．has been raining
B．was raining
C．had been raining
D．has rained
单项选择题
She asked me when I()Beijing.

A．arrived
B．arrived to
C．reached
D．reached to
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