People in Korea bow when they meet for the first time.A. supposed toB. are suppose to C. a

问题补充：

People in Korea bow when they meet for the first time.

A. supposed to

B. are suppose to

C. are supposed

D. are supposed to

答案：

A. supposed to

B. are suppose to

C. are supposed

(答案→)D. are supposed to

解析：本题的含义为当韩国人初次见面的时候理应鞠躬，be supposed to do表示理应做某事的含义，故本题选D。