题目内容

Don’t be afraid of asking for information ______it is needed.
A．whenB．afterC．althoughD．unless
A

试题分析：句意：当它是被需要的时候，不要害怕去询问信息。分析选项：when 当...时候；after在...之后；athough虽然；unless="if" not除非，根据句意是当…..时候解，故选A
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