Only when you have obtained sufficient data ________ come to

題目:

Only when you have obtained sufficient data ________ come to a sound conclusion.
A.can you
B.you can
C.would you
D.you would

解答:

答案A
only放在句首,引導從句,需用倒裝語序.又根據時態一致原則,只能選A.

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