.__________ he had not hurt his leg, John would have won the race.
A．IfB．Since
C．ThoughD．When
A。
if在此引出一個虛擬條件。又如：If he had asked me, I would have had to tell him the truth. 如果他問我，我就不得不告訴他真相了。If I had not got married, I would still have been living abroad, 如果我沒結(jié)婚，我就會仍然住在國外。
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