While people sometimes can’t help buying something they don’t really need.A. shoppedB. b

问题补充：

While , people sometimes can’t help buying something they don’t really need.

A. shopped

B. being shopped

C. to shop

D. shopping

答案：

A. shopped

B. being shopped

C. to shop

(答案→)D. shopping

解析：shop与其逻辑主语“people”之间是主动关系，故用现在分词作时间状语。