There is some doubt _________ Mr Zhang will sign the contract with us.A．whenB．wh_刷题宝

题干

There is some doubt _________ Mr Zhang will sign the contract with us.

A．when

B．whether

C．if

D．that

上一题下一题 0.64难度单项选择更新时间:2011-02-23 04:53:42

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