There___so much work thant I have ___ now!A is,to do B am,do C are,done D have,been done

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There___so much work thant I have ___ now!
A is,to do B am,do C are,done D have,been done

work是不可数名次be动词要用单数is
have to do sth 不得不做某事
have to 情态动词
应该选A

直接排除BCD选A
因为WORK是不可数名词.用IS.
HAVE TO DO则是动词不定式..没什么好说的.

a