Be sure _______ when you enter the cave. Otherwise, you’ll hit your head on the rocks.
It usually ________ Mum about half an hour to cook supper.
—________ is your school from here? —About one kilometer.
The river is between the two villages,so you can go to one of them ________.
—________ do you go to school? —Of course by bus.
—________ is it from here to the railway station? —About ten kilometers.