My colleague has been recovering gradually since the operation, and it wont’ be long ______ he comes back to work．
A．beforeB．sinceC．a(chǎn)fterD．when
A

試題分析：考查連詞，before 意思“（直到…）才”，since意思“自從”，after意思“…之后”， when意思“當(dāng)……時(shí)候”，句子意思“自從做完手術(shù)，我的同事一直在恢復(fù)，直到他回去工作用不了多長(zhǎng)時(shí)間”，所以選A
點(diǎn)評(píng)：連詞是常考內(nèi)容，尤其是before，注意它的用法，基本意思“在…之前”，最�？嫉氖莃efore 意思“（直到…）才”。
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