导航:题目详情 | 答案解析 | 相关问题 | 最新问题 【C17】A.once whenB.onceC.when onceD.once if 外语类 2017-09-15 21:15:21 正确答案 已帮助 人 【C17】A.once whenB.onceC.when onceD.once if请帮忙给出正确答案和分析,谢谢! 热搜:a是b的充分条件,b是a的必要条件吗 答案解析 难度★★☆ 搜索 正确答案:B语法辨析题。once引导时间状语从句,意为“一旦……”,但有了once就不能再加when。 相关问题 1、【C17】A.borne outB.borne onC.borne upD.borne down 2017-08-29 2、______I admit that she has shortcomings. I still like her.A.WhenB.AsC.WhileD.Once 2018-02-08 3、When the new manager took______the store he made it more profitable.A.outB.onC.overD.in 2018-04-21 4、If they keep going______like that they must expect trouble.A.alongB.onC.upD.with 2018-04-21 5、_____ to sleep again than the telephone rang once more .A.Hardly when he wentB.Hardly 2018-06-20 6、___________[A] when [B] once [C] while [D] whereas 2018-07-04