Nearly three months had gone by ______ the seriously injured girl showed a slight sign of recovery.
A．untilB．a(chǎn)fterC．since D．before
D

試題分析：連詞辨析。A直到…才；B在…之后；C自從；D在…之前；句意：幾乎三個月以后那位受傷嚴重的女孩慢慢地顯示出康復的跡象。Before與一段時間連用，翻譯成一段時間以后。故D正確。
點評：連詞的詞義辨析要根據(jù)上下文的語境，要注意一些連詞的一詞多以現(xiàn)象。
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