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EversincePicasso'spaintingswentonexhibit,therelargecrowdsatthemuseumereryday.AisBhavebeenChasbeenDarebeing我想问这题考察的点是什么?

题目详情
Ever since Picasso's paintings went on exhibit,there ___large crowds at the museum erery day.
A is B have been C has been D are being
我想问这题考察的点是什么?
▼优质解答
答案和解析
自从毕加索的画展出之后,博物馆里每天都是人山人海.
ever since表自从,是现在完成时的标志,“博物馆里每天人山人海”这种状况,是从“自毕加索的画展出之后”这个动作发生后,便一直持续到现在,以后还有可能继续持续下去,故而此题的考察点是现在完成时,检查学生对现在完成时的掌握程度.