—Unluckily, you couldn’t come to the picnic with us. It was so much fun there. You must come next time.—No, thanks. I don’t think I ______ any fun.
In Britain, you must reach 18 ________ you want to drive a car.
I'll write a letter to you ________ I arrive in New York.
I told him the news ________he came back yesterday.
—Ring me up ________ you come to my house, will you? —Sure, I will.
You will fail the exam ________ you work hard.