摘要:第一节 单项选择(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.并在答题卡上将该项涂黑.21. I can’t stand beside him-he is always asking me to do everything for him. A. having sat B. sit C. sat D. sitting

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