The teacher set such a difficult problem ________none of us could solve.A．thatB．_刷题宝

题干

The teacher set such a difficult problem ________none of us could solve.

A．that

B．so that

C．which

D．as

上一题下一题 0.64难度单项选择更新时间:2017-02-07 04:18:20

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