With time going on, _____.

A. a luxury may change into a need which most people want to get
B. the basic needs are getting smaller and smaller
C. a luxury and the basic needs can be exchanged
D. the basic needs can be changed into a luxury
A. a luxury may change into a need which most people want to get
B. the basic needs are getting smaller and smaller
C. a luxury and the basic needs can be exchanged
D. the basic needs can be changed into a luxury

【答案】