定语从句 the speed ( ) you drive your car mustn't be too high
问题描述：
定语从句 the speed ( ) you drive your car mustn't be too high
A in which B at which C by which D on which
答
at the spee“d以某种速度”
the speed at which you drive your car……
You drive you car at the speed and the speed mustn't be too high.