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first D. By the first time 答案 A 4. ________ it would be silly to argue any longer. A. Was that true B. If that was true C. Should that be true D. Could that be true 答案 C 5. — I offered two yuan to ________ for your seat. Would you take it? — All right. A. change B. exchange C. give D. sit 答案與解析 B exchange“ 交換 ” 。 4. We had great difficulty building the stadium within three months, but we finally made ________. 答案與解析