一道英语语法选择题.Mary,turnoffthewater__youarebrushingyourteeth.
---Mary,turnoffthewater__youarebrushingyourteeth.
---Sorry.Iwilldoitatonce.
A、untilB、whileC、duringD、whether
我知道B有道理.为什么不能选C啊~
C是during.