A.Working as a tourist guide.B.Helping in a restaurant.C.Working as a shop assistant.D

外语类 英语考试 已帮助 人

A.Working as a tourist guide.

B.Helping in a restaurant.

C.Working as a shop assistant.

D.Looking after a laboratory.

请帮忙给出正确答案和分析,谢谢!

热搜:a是b的充分条件,b是a的必要条件吗