Maryisa warm-heartedlady.Sheisreadytohelpothers,butnev...

問題詳情：

 Mary is a warm-hearted lady. She is ready to help others, but never expects anything 　　　.

A. in trouble        B. in charge        C. in peace         D. in return

【回答】

D

知識點：介詞

題型：選擇題