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题目
a.Is it hard to learn french b.Just thank of the hours of hard work--Billy has spent.
A.whenBwhichCon which D.in which请问一下理由及答案
答案为B

提问时间:2021-04-01

答案
C,因为首先从句补充完整是Billy has spent the hours on hard work
词组spend on sth 或spend in doing sth 所以排除D
又因为此句是定语从句,从句里少了on hard work ,所以填on which,which指代hard work
所以不选B,又因为此句不涉及时间,所以不选A,选A时候例如:he doesn't know the day when Billy got married.
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