if you _____ your way,you would have to ask a policeman

题目

if you _____ your way,you would have to ask a policeman
A.lose B.lost C.had lost D.losing

答案

答案：B
本句根据后面的主句可知道是虚拟语气,而在虚拟语气中,主句是表示与将来事实相反,那么从句可以可以有三种情况：1、从句用过去时；2、用should + do（动词原形）；3、用 were to do 的形式.
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