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几道英语问题,麻烦解释一下

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几道英语问题,麻烦解释一下
1.Tom,you feed the rabbit today ,( )?
But i fed it yesterday.
A don not you B did not you C do you

2.The result of the experiment was very good,( ) we had not expect.
A have heard B had heard C heard
3.The person who is in charge of the factory has ( ) ill since last week.
A been B fell C fallen
题目2 选项错了
几道英语问题,麻烦解释一下
1.Tom,you feed the rabbit today ,( )?
But i fed it yesterday.
A don not you B did not you C do you

A don't you?
反意疑问句,前面肯定,后面否定.
2.The result of the experiment was very good,( ) we had not expect.
A have heard B had heard C heard
用which,怀疑选项弄错了.
非限定性定语从句.
3.The person who is in charge of the factory has ( ) ill since last week.
A been B fell C fallen
A been
因为有has所以用完成时,而病是个点动作,有since last week段时间,所以不能用C