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问题: 时态,

24. Eric received training in computer for one year,______ he found a job in a big family.
A. after that B. after which
C. alter ii D. after this
33. — Has your father returned from Africa yet?
— Yes, but he_____ here for only three days before his company sent him to

解答:

24. Eric received training in computer for one year,______ he found a job in a big family.
A. after that B. after which
C. alter it D. after this

选B. after which
知识点:在定语从句中,有2种情况关系代词要用which:1。在非限制性定语从句中;2。跟在介词后面。本题考查的是第2种情况,after为介词。
哪里不懂请提出`