-- _____ I ask you a question, Mr. Wang?      -- Yes, you _______.

---Must I go to the gym three times a week? ---No, you ______. Twice a week is OK.

There was something wrong with the network，or the e-mail____ earlier.

We can see light in his office. He___________ be in his office.

(2010·四川高考)—________ I take the book out?—I'm afraid not.