—As a teenager,our son should have two or three hobbies to be really happy.—________,but how can he afford the time with so much homework every day?
He lost his favorite watch, _________ made him very sad.
I’m going to see what Dad is________. Two hours is a long time to take over a coffee.
Professor Li is the person to ____________ you should write.
Do you know the reason _______ he was late?
I’ll take you to the museum ______ you may see everything _________ you want.