(   ) 1. There are three children       under the tree.

   A. to play   B. playing

   C. play   D. played

10. Pandas       ( born) in zoos may go back to live in the nature parks.

9. Scientists should do more to help bears       (produce) more babies.

8. It's not allowed       (kill) the animals.

7. We found it was very difficult       (get) a car.

6. The WWF is working hard       (save) them all.

5. The pandas won't have enough places       (live)

4. Its not easy       (learn) French well.

3. The good news made me       (excite) .

2. It is very        (interest) to see the animals feed their children.