---- Could I take a few days’ leave, sir?
----- I’m afraid you can’t ___________ the work is being done.
A．untilB．beforeC．a(chǎn)fterD．a(chǎn)s
D
考察連詞辨析。A直到…才…B在…之前；C在…之后；D因為；結合句意可知D正確。句意：—先生。我可以請幾天假嗎？—恐怕不行，因為工作正在進行中。
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