. Will you please keep quiet now? You shouldn’t talk until ________ to.A．askingB_刷题宝

题干

. Will you please keep quiet now? You shouldn’t talk until ________ to.

A．asking

B．having asked

C．to ask

D．asked

上一题下一题 0.64难度单项选择更新时间:2011-11-20 08:30:20

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