—Dad, can I go out?—Yes, but please be careful not to play on the street when there are too many cars.
It’s important ______ us students ______ carefully in class.
Don’t always play tricks ______ your classmates.
Tom is fat. The doctor asks him to ______ and ______.
—Would you like some ______? —Yes, please. I’m hungry.
—______ do most Chinese people have meals? —Three times a day.