题目内容

-________ this a bag? -Yes, ________.

[  ]

A.is, it's
B.Is, it's
C.Is, it is
D.is, it is
答案:C
解析:

C这是个一般疑问句,句子开头首写字母应大写,在回答时用it来代替this,it is在肯定回答时,不可以以缩写形式出现.


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