—______will you come back, Mum?
—In ten minutes.

         —Which of these two English books will you borrow?
—I’ll borrow ______ of them. Because they are very interesting.

         —I can’t decide ______.
—You mean the purple sweater or the blue one?

—The Mars-500 test will take about 520 days.
—__________  I hope it goes well.

—Do you mind if I smoke here?
—_______ You can go to smoke in the next door.

—I’m going to Sanya for my holiday tomorrow.
—_______

—_______ should we clean the library?
—Twice a week.     

—The museum isn’t far from here. Why not go there by _______?
—OK. And it’s good for our health.
                                              
A                    B                  C                   D

— Would you like me to show you the way?      ---_________.

---_______ the Internet ___________ in your school?
　       ---Yes, but the computer in our office has broken down.