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
问题描述：
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
答