题目内容
【题目】They waited and waited, and_______ he came back.
A. at once B. at first C. at the end D. at last
【答案】D
【解析】试题分析：A. at once立刻，马上；B. at first首先；D. at last最后；句意：他们等了又等，最后他回来了。结合句意，故选D
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题目内容
【题目】They waited and waited, and_______ he came back.
A. at once B. at first C. at the end D. at last
【答案】D
【解析】试题分析：A. at once立刻，马上；B. at first首先；D. at last最后；句意：他们等了又等，最后他回来了。结合句意，故选D