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3道高考英语单选题,求详解

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3道高考英语单选题,求详解
1.His sister left home in 1998,and __________ since.
A.had not been heard of B.has not been heard of
2.Edward,you play so well.But I_________ you played the piano.
A.didn't know B.hadn't known C.don't know D.haven't known
3.Everybody was touched __________words after they heard her moving story.
A.beyond B.without C.of D.in
baa是对的,怎么选出来的啊?关于第一题,句中有and,and左边用left,右边应该用过去的一种时态啊,为什么不选A呢?2题也还是不懂,3题懂了,
3道高考英语单选题,求详解
1.His sister left home in 1998, and _B_ since.
A.had not been heard of B.has not been heard of 从1998年到现在这个时间段,所以是现在完成时
2.Edward, you play so well. But I_A_ you played the piano. Edward played the piano
A.didn't know B. hadn't known C.don't know D.haven't known 与从句you played the piano的时态一致.所以选A
3.Everybody was touched _A_ words after they heard her moving story.
A.beyond B.without C.of D.in beyond words=难以言表 感动得难以言表