The car ahead of me suddenly stopped by the roadside,I think it ___out of gas. 应该选A请详细解释.
问题描述：
The car ahead of me suddenly stopped by the roadside,I think it ___out of gas. 应该选A请详细解释.
A.may run
B.may have run
C.must run
D.should have run
B是正确的，为什么呢
答
我前面那辆车突然听到了路边,我想那辆车大概没油了吧.
现在完成时啊.
从句已经用了过去式,主句要体现的意思是那辆车在停之前已经么有油了.有两个时态的小小对比.