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1. I didn't buy the dictionary yesterday _________ my aunt would give me one.
A. until B. because C. if D. before 答案: B (选择A的同学要注意语境)
2. I'm going to look for another job ________ the company offers me more money.
A. after B. unless C. when D. for
答案: B ( 选择其它三项的同学要注意语境, 这里是指除非公司给我更多工资,否则我就要找其它工作.)
3. Don't hurry. The bus won't start ________ everybody gets on.
A. since B. as C. until D. when
答案: C (选择D的同学要注意前面是否定.)
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