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How many more decades will have to pass ______ scientists succeed in providing a cure for cancer?
How many more decades will have to pass ______ scientists succeed in providing a cure for cancer?
admin
2010-01-07
34
问题
How many more decades will have to pass ______ scientists succeed in providing a cure for cancer?
选项
A、when
B、before
C、since
D、until
答案
B
解析
本题考查的是固定句式。when当……时候;before在……之前;since自从;until直到。还要有多少年过去之后,科学家才能够成功地发现治疗癌症的方法?
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成人本科学位英语
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