题干

He was still full of optimism for the future despite many problems, and never once ______ him get worried or upset.
A.I sawB.I would see
C.did I seeD.would I see
上一题 下一题 0.65难度 单项选择 更新时间:2019-01-28 12:01:25

答案(点此获取答案解析)