题目内容
I ________ him in time, otherwise he would have fallen off the bike.
A.had supported B.supported
C.have supported D.support
B
【解析】B 考察虚拟语气。句义:我及时扶住了他,要不然他就会从自行车上摔下来。根据题干中的otherwise he would have fallen off the bike可数是对过去事实进行虚拟,所以使用一般过去时。故B正确。
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