--When did you become a volunteer for the elderly?-- Two years ago. I thi

题型：不详难度：来源：

--When did you become a volunteer for the elderly?
-- Two years ago. I this group since then.

A．joined

B．took part in

C．have joined

D．have been in

答案

解析

有since短语或从句修饰主语通常用完成时，结构为have+过去分词，但在完成时
短暂动词不能和时间状语连用，join属于短暂动词，故只能选D。

举一反三

There _______ less air pollution in the country .

A．are

B．is

C．have

D．has

题型：不详难度：| 查看答案

There ________ a sports meeting next week.

A．has

B．is going to be

C．is going to have

D．will have

题型：不详难度：| 查看答案

---Where is your father? ---He _______ to Shanghai. He has ever ______ there twice.

A．has gone, gone

B．has been, been

C．has gone, been

D．has been, gone

题型：不详难度：| 查看答案

---I’m sorry. I _____ your printer for such a long time. ---Never mind.

A．have borrowed

B．have lent

C．have kept

D．have bought

题型：不详难度：| 查看答案

Xiao Li _________ his hometown for ten years．

A．has left

B．1eft

C．has been away from

D．went away from

题型：不详难度：| 查看答案