一个小时之内完成这项工作对她来说是不可能的.It is impossible for her（）（）the work in an hour.一个小时之内完成这项工作对她来说是不可能的.It is impossible for her（）（）the work in an hour.直到老师进来我们才安静.We（）quiet down（）the teacher came in.直到父亲回来他才睡觉.H
网友回答
1 to finish
2 didn't until
3 didn't until
4 not to be late
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