I'm going for a field trip but I haven't decided_________.
— ________ does your mother go to work? — She usually goes to work in a car.
— When ______ he buy his bike? — Two years ago.
I can’t play basketball after school because I ______ do my homework first.
— ________ does it take to get to school? — It takes about 15 minutes.
Listen! Who ______ in the classroom?