Look, where are you going!—Sorry, I _______

It’s a secret between us. Don’t tell anybody. —Sure, ______________.

When we write our homework on the computer, we should _____ first.

If there are _____people driving, there will be ______air pollution.—Yes, the air will be fresher and cleaner.

lled to tell his mother that he couldn’t enterthe house, for he ________ his key at school.