【答案】—Mrs. Wang was sent to teach English in a poor mountain village last year.

—Mrs. Wang was sent to teach English in a poor mountain village last year.

—She said she would never forget some pleasant ______while working there.

A. experiments

B. expressions

C. experiences

D. emotions

【答案】

C

【解析】

名词辨析。根据句意“她说他将永远不会忘记她在那儿工作的愉快经历。” experience当经历讲可数。故选C。