题干

It’s seemingly unfair that girls can change into skirts during the hot weather ___________ boys have to swelter in long trousers.
A.sinceB.while
C.whenD.as
上一题 下一题 0.65难度 单项选择 更新时间:2018-05-21 09:01:41

答案(点此获取答案解析)