--- May I go and play with Dick this afternoon, Mum?
--- No, you can’t go out _____ your work is being done.
A．beforeB．untilC．a(chǎn)sD．the moment
C

試題分析：考查連詞辨析。A在…前；B直到…才；C因?yàn)�；D一…就…；句意：—媽媽今天下午我可以和Dick出去玩嗎？—不行。因?yàn)槟阏谧鲎鳂I(yè)，所以你不能出去。本題特別容易錯(cuò)選B項(xiàng)，但是橫線后面的句子的意思不相符。后面的句子表示的是原因。故C正確。
點(diǎn)評：本題中的B項(xiàng)干擾較大，Not…until…直到…才；后面的句子表示原因，故使用as表示原因即可。
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