the math teacher gave us some exercises and asked us ______选哪个,为什么?the math teacher gave us some exercises and asked us ______ A. to work them on B. working them on C. to work on them D. working on them

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the math teacher gave us some exercises and asked us ______选哪个,为什么?
the math teacher gave us some exercises and asked us ______
A. to work them on B. working them on C. to work on them D. working on them

C: to work on them

C
祝你学习愉快! (*^__^*)
请及时采纳,多谢!

c
work on 动介词组 代词放后边
ask sb to do sth

C 句型:ask sb. to do sth. 而且, work on them说得通,work them on 说不通。