how much time does your sister usually spend_____her homeworkhow much time does your sister usually spend_____her homeworkA.do B.to do C,doing

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how much time does your sister usually spend_____her homeworkhow much time does your sister usually spend_____her homeworkA.do B.to do C,doing
how much time does your sister usually spend_____her homework
how much time does your sister usually spend_____her homework
A.do B.to do C,doing

how much time does your sister usually spend_____her homeworkhow much time does your sister usually spend_____her homeworkA.do B.to do C,doing
on
spend ,on 花费时间金钱做某事

on

on

选c 这个句式是sb spend some time on sth或者in doing sth 希望有帮助

C.spend time (in) doing sth.
in可以省略

C吗?

C