I. 1. valuable

   2. belong to

   3. policemen

   4. At first

   5. run after

   6. at the same time

II. 1-5 CABDE

III. 1. must

     2. may

     3. could not

     4. might

     5. may not

IV. 1. picked up

     2. landing

     3. express

     4. point out

     5. energy

     6. a long period of time

     7. on the phone

     8. belong to

V. One possible version:

My pet cat, Mimi, has been missing for several days. We are all worried about her very much. Where can she be now? She might be in danger. She might be caught by some little boy or girl to play. It is also possible that she is looking for food along the street. She must be trying to find out the way home. She may be safe. She could be sent to the animal protection center. Maybe she is playing somewhere with other cats. I think she can’t be dead because of traffic. We hope Mimi can be found as soon as possible.