my father knows a lot about American culture ,for he ___ there for 2 years ,and then he returned hom

my father knows a lot about American culture ,for he ___ there for 2 years ,and then he returned hom

题目
my father knows a lot about American culture ,for he ___ there for 2 years ,and then he returned home.
A.stays
B .stayed
C.would stay
D.have stayed
答案
选项:B
解析:因为题目交代了父亲已经回家了,所以此时已经不再美国了,故可排除A和D.C是将要,也不符合题意.选B.
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