A.They are shopping.B.They are jogging.C.They are seeing a movie.D.They are drinking c

外语类 公共英语 已帮助 人

A.They are shopping.

B.They are jogging.

C.They are seeing a movie.

D.They are drinking coffee.

热搜:a是b的充分条件,b是a的必要条件吗