—Don't you believe me?—________, I'll believe ________ you say.
--Can I have your name, sir?--Err… Albert Johnson, if you _______ know.
Do you know the boy under the tree_______ is playing with a dog/
Many people believe if you are _______, better things will happen to you.
I’ve just read your blood test report and all seems OK, so there’s _______ to worry about.
--Could you help me with some math problems?--Sure. That’s _______ I’m here.