______ you do the experiment carefully, you would make discoveries others wouldn’t make.
A．ShouldB．WouldC．CouldD．Might
A

試題分析：句意：如果你仔細(xì)的做實驗，就會有別人沒有的發(fā)現(xiàn)。主句用了would do表示和將來相反的虛擬語氣，條件狀語從句也是和將來相反的虛擬語氣，用should do，did或were to do，可以省略if，提前should或were，所以選A。
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