题目内容

-________ Frank ________ his homework now?

-No,he ________.

[  ]

A.

Does;doing;doesn't

B.

Is;doing;doesn't

C.

Is;doing;isn't

D.

Is;do;isn't

答案:C
解析:

  由时间状语now确定应用现在进行时态,故选C。


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