英语单选
After______seemed half an hour the door opened and out came the man. A.that B.what C.it D.which 答案:B why?
after+some time/句子 what seemed half an hour = half an hour 用it,主谓不一致 用which不符合定语从句得要求,若改为 some time which则对
答:after这里是介词,+doing/being done 所以选B. 连词需要接句子。after/before/since/until既可作连词也可作介词。和w...详情>>
问:单选题 I watch TV __________ Sunday morning...
答:答案是C,通常在早晨.下午.晚上,我们用in the morning/afternoon/evening,但三个名词有限定结构时,介词in要改为on.其他例子如...详情>>