My mother has __to do every day. A.a lot of works B.a lot of work C.many work D.some works

My mother has __to do every day. A.a lot of works B.a lot of work C.many work D.some works

B 不可数名词
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work不可数，不能加s，排除AD
不可数名词不能用many修饰，排除C
选B

B因为工作不可数

B
work 为不可数名词，不能用复数形式故AD不可选。many+可数名词，故C不可选。