.Tell John not to leave the house unless he________that the lights ______ .
As a boy, it’s really_________ for me to go on the stage to dance for the first time.
Can you lend me the book ______the other day?
I like this book _______has a photograph of the author.
People ________do exercise every day have a better chance of staying healthy than those ________don’t.
He is the person _______,I believe, has the ability to do this challenging job.