问题描述: He left without ____.A.noticed B.notice C.noticing D.being noticed 1个回答 分类:英语 2014-10-31 问题解答: 我来补答 he left without noticing sth 因为后面没sth所以是he left without being noticed.:D 意思是他离开了,没人注意到.答案 D 展开全文阅读