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。 3. ________ I went to the seaside, I picked up a great many shells. A. The first time B. Firstly C. At 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 exc