------What are you doing?------I'm ____ the math problems.A.work B.working C.working on D.working of

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------What are you doing?------I'm ____ the math problems.A.work B.working C.working on D.working of
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------What are you doing?------I'm ____ the math problems.A.work B.working C.working on D.working of
------What are you doing?
------I'm ____ the math problems.
A.work B.working C.working on D.working of

------What are you doing?------I'm ____ the math problems.A.work B.working C.working on D.working of
选c
首先,根据语态要用现在进行时
另外,work on 是固定短语,放在原句中,解释为在解数学题,意思相符.

C work on 表示在做什么.
因为是现在进行时,所以用working.故选C

C

you are what you you are what you you are what you you are what you tell me____ A what are you reading B what do you reading C what you are reading D you are reading选哪个,为什么? Hi ,Pamela.Hi,George.What are you 1.d nowHi ,Pamela. Hi,George.What are you 1.d now? what are you waiting what are you fucking what are you doing? What are you making? what fuck are you What are you doing? what are you doing what are you going? What are you from? What are you doing? what are you fuck what are you 必有重谢