--When did you join the Party?--I the Party for two years.A. joinedB. have joinedC. have

问题补充：

--When did you join the Party?

--I the Party for two years.

A. joined

B. have joined

C. have been in

D. have been joined

答案：

A. joined

B. have joined

(答案→)C. have been in

D. have been joined

解析：句意：你什么时候入的党？我入党已经两年了。join是瞬间动词，它相对应的延续性动词是be i故选C