Don’t be afraid of asking for information ______it is needed.
A．whenB．a(chǎn)fterC．a(chǎn)lthoughD．unless
A

試題分析：句意：當(dāng)它是被需要的時(shí)候，不要害怕去詢問信息。分析選項(xiàng)：when 當(dāng)...時(shí)候；after在...之后；athough雖然；unless="if" not除非，根據(jù)句意是當(dāng)…..時(shí)候解，故選A
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