Peter knew _______________.A.whether he has finished reading the book
题目
Peter knew _______________.A.whether he has finished reading the book
B.why the boy had so many questions
C.there were 12 months in a year
D.when they will leave for Paris
这个题答案选的是B,A、D时态不对；C怎么错了?
答案
C 错在把现在的客观事实用过去式 改为 are 就对了
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