You are not supposed ________ in public.A. smoking B. to smoke C. to smoking
— ________ 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?