单选题I wonder how many years ago _____.Adid your father retireByour father retiredChas your father retiredDyour father has retired

单选题
I wonder how many years ago _____.
A

did your father retire

B

your father retired

C

has your father retired

D

your father has retired


参考解析

解析:
宾语从句中用陈述语序。排除A、C。时间状语(how many years ago)提示要用过去时,故为B。

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