单项选择题

23 It（）have mined last night, for the ground is wet.

A．will
B．can
C．should
D．must

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单项选择题
You will find the matter（）about all over the company.

A．being talked
B．talked
C．talking
D．to talk
单项选择题
His parents asked him to buy books（）he found useful and necessary for his study.

A．whichever
B．whatever
C．whenever
D．however
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