The time has come ______ we can make extensive use of nuclear energy．A．whenB．whi_刷题宝

题干

The time has come ______ we can make extensive use of nuclear energy．

A．when

B．which

C．since

D．while

上一题下一题 0.64难度单项选择更新时间:2010-10-29 11:41:23

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