摘要:第一节 单项填空(共15小题,每小题1分.共15分) 从每题所给的A.B.C.D四个选项中.选出可以填入空白处的最佳选项.并在答题卡上将该项涂黑. 例:It’s so nice to hear from her again. ,we last met more than thirty years ago. A. What’s more B. That’s to say C. In other words D. Believe it or not 答案是D.21. Experiments of this kind in both the U.S. and Europe well before the Second World War. A. have conducted B. have been conducted C. had conducted D. had been conducted

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