Students must spend a lot of time ______ every day.A.studying B.study C.studies D.studied

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Students must spend a lot of time ______ every day.A.studying B.study C.studies D.studied
Students must spend a lot of time ______ every day.A.studying B.study C.studies D.studied

Students must spend a lot of time ______ every day.A.studying B.study C.studies D.studied
选择A
spend .(on)doing .

A

A

B ---主语决定,主语是复数因此排除C。另外must要用一般现在时,排除A和D。