The volunteers a lot of help to the community for nearly ten years.A. offeredB. will offe

问题补充：

The volunteers a lot of help to the community for nearly ten years.

A. offered

B. will offer

C. are offering

D. have offered

答案：

A. offered

B. will offer

C. are offering

(答案→)D. have offered

解析：本题难度适中，考查现在完成时，由for nearly ten years.可知是用现在完成时，选D答案。