问题标题:
EricusedtoonweekendsbutnowheisusedtomathwithFrank.A.playinggamesstudyB.playsgamesstudyingC.playgamesstudyingD.playinggamesstudying
问题描述:

Ericusedto   onweekendsbutnowheisusedto   mathwithFrank.

A.playinggamesstudy        B.playsgamesstudying

C.playgamesstudying        D.playinggamesstudying

 

毛万标回答:
  C
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