分类：教育/科学-外语学习-英语考试
问题：请教单选，谢谢1.Afteryouhaveusedthedict 
1.After you have us the dictionary ,please put back ________it belongs.A.where     which 2.Before ______to the college ,he had to go through an examination.A being  admitted    B.having been admitted 这里的before 是介词还是连词呢,我们不是说，事物先后发生用have 来表示吗，3.The new rules for the gam1.After you have us the dictionary ,please put back ________it belongs.A.where     which 2.Before ______to the college ,he had to go through an examination.A being  admitted    B.having been admitted 这里的before 是介词还是连词呢,我们不是说，事物先后发生用have 来表示吗，3.The new rules for the game will be ____next year . e  into effect   e into use c.put into practice 我觉得这三个选项都可以用，可它答案只选 了最后一个选项，为什么？
回答：A,A,C
1) 选A
2) A,是介词，后面是动名词的被动式。
3) 注意前面的 be，这里要用被动语态，只能选C.