—I wonder ________ so many people are crazy about Gangnam Style.—It's good for bodybuilding, and it brings people a lot of fun, you know.
——Can I speak to Mr Wang? ——Sorry, he' s out. Can I _____ a message?
——Have you _____ the invitation to the party? ——Yes, I have. And I've ______ it.
——Could I speak to Mr Brown? —— ______ , I'1l go and see if he is in.
Your English teacher looks very young; He _____ be over 30.
——Need I clean the room now? ——Yes, you _____ , but you ______ ask someone to help you.