—Mom, my classmates invited me ____ a field trip. May I go with them?—OK.A. go on B. to go on C. to go in
My mother _______ goes to work by car because she cannot drive a car
Simon doesn't know what _______ today.
There are three _______doctors and five ______nurses in the room.
-- ______ do you exercise? --Three times a week.
Millie needs _______healthy.