e _______ to get it for the last five weeks."? A. have been trying B. had tried? C. will be trying D. will have been trying?for the last five weeks表示延续的时间状语?答案 AР1. "How long had you been waiting before Mr. Winter finally arrived?"? "Well, he came at three o'clock, and I _______ the day before."? A. had waited after B. had been waiting since? C. was waiting from D. had been waiting for?等某人 wait for sb.?for接一段延续的时间,since接过去时间状语或过去时句子。?答案 BР1. My niece has been to Sumatra(苏门达腊) and Iran(伊朗) as well as all of Europe. By the time she's twenty, she ______ almost everywhere.? A. will be B. would be C. will have been D. would have been?答案 C?2. By the time you get to Greenwich you ________ the most historic parts of London.? A. will be seeing B. will see? C. are going to see D. will have seen?答案 D
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