___________ she couldn't see his face,she could tell by his voice that he was young.( )
A.UnlessB.IfC.BecauseD.Though
--- Lin Tao, can I use your English dictionary? --- Sure. But you _______ return it before the class.
--What are you going to do tonight, Cindy? --I’m not sure. I __________go to see a movie with my friends.
—Mum, may I draw some flowers on the wall? —Oh, no, dear, you _______. Why not draw your beautiful flowers on the paper?
—I saw Mr. Wang at school just now. --You ____________ make a mistake. He has gone to Shanghai and won’t get back until next Monday.
This book ___ be yours. Look! Here is your name.