摘要： A small car is big enough for a family of three you need more space for baggage. A.once B.because C.if D.unless 答案 D 解析 本题考查连词的用法.句意为:一辆小汽车对于一个三口之家足够大了.除非你需要更多的空间放行李.unless相当于if not.

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