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> Scientists say it may be five or six years_______it is possible to test this medicine on human patie
Scientists say it may be five or six years_______it is possible to test this medicine on human patie
题目简介
Scientists say it may be five or six years_______it is possible to test this medicine on human patie
题目详情
Scientists say it may be five or six years_______it is possible to test this medicine on human patients.
A.when
B.after
C.before
D.since
题型:单选题
难度:偏易
来源:不详
答案
C
试题分析:考查固定句型:It will/may be+一段时间+before….过多长时间才/就….句意是:科学家说可能要5到6年这种药才能在病人身上做实验。选C。
点评:有的固定句型很相似:有的是时态的区别,如果:It is+一段时间+since…,注意辨别清楚。
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题目简介
Scientists say it may be five or six years_______it is possible to test this medicine on human patie
题目详情
答案
试题分析:考查固定句型:It will/may be+一段时间+before….过多长时间才/就….句意是:科学家说可能要5到6年这种药才能在病人身上做实验。选C。
点评:有的固定句型很相似:有的是时态的区别,如果:It is+一段时间+since…,注意辨别清楚。