Question

Marry stamps ________ by me since last year.

[　　]

A．are collected

B．were collected

C．have been collected

D．had been collected

Answer 1

答案：C
解析：

since作介词或连词表示“自从……以来”常和完成时态连用。表示到现在为止完成的动作，且主语是谓语动词动作的承受者，谓语动词要用现在完成时的被动语态。