I arrived at the inn late at night and asked the landlord for a room．“There’s nothing left,” he said, “_________ to sleep in Number 13”．A.if you didn’t likeB.If you don’t likeC.unless you are likingD.unless you’d like
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D解析考查unless引导的从句。虽然unless的含义相当于if…not．．，但此题unless强调“例外的特殊情况”。