1.the distance from my house to school is about 2 km(If) .2.there didnt use to be many cars on the roads befor.(used).3dont drive too fast or youll have an accident(If).4.Is it possible to go to sapa by motorbike?(can).5.my mother is a careful driver.(drives)
$\begin{array}{I}\text{1.It is about 2km from my house to school.}\\\text{2.There used to be a few cars on the roads before.}\\\text{3.If you drive too fast,you'll have an accident.}\\\text{4.Can we go to Sapa by motorbike?}\\\text{5.My mother drives carefully.}\end{array}$