______they have been working hard to find?A．Is that whatB．Is thatC．It is that_刷题宝

题干

______they have been working hard to find?

A．Is that what

B．Is that

C．It is that

D．Is it that

上一题下一题 0.64难度单项选择更新时间:2010-06-30 03:45:42

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