— Hello, may I speak to Mr. Wu? — I’m afraid he is not in now. ______ I take a message?

—May I swim here?  — No, you _______.  It is dangerous.

You _______have a wrong number. There’s no Mr Johnson here.

Brain, like muscles, also needs some kind of exercise and nutrition. The more you use your brain in the right direction, the more you ________ enhance your ability.

You _________ get up so early. It’s weekend today.