摘要:第一节:单项填空(共15小题, 每题1分.满分15分) 从A.B.C.D四个选项中.选出可以填入空白处的最佳选项. 21. ---- What happened? ---- They left in such hurry that they forgot to lock door. A. a, a B. /, the C. a, the D. /, a

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