完形填空。 There are different 1 of animals in the zoo. They don't have to 2 food by themselves. We can see the zoo keepers give them food to 3 . They just eat, walk and sleep 4 day. So many of us may think that the animals there are 5 and lucky. But most of them are sad. Why? They're no 6 free! Animals like elephants, monkeys and tigers usually live freely and happily in forests or mountains. Tigers, for 7 , run, jump, play with their children and catch small animals for food. But now they have to stay in small room in the zoo. Their life in the zoo is quite 8 from their life in the forests. Now many of us think more animals should go 9 to forests and mountains so 10 the earth will become better. (     )1. A. a kind of (     )2. A. to find (     )3. A. dance (     )4. A. week (     )5. A. pleasure (     )6. A. some (     )7. A. more (     )8. A. better (     )9. A. back (     )10. A. when B. a kind B. finding B. sing B. all B. sorry B. a B. example B. different B. to B. that C. kind C. find C. eat C. whole C. sad C. any C. as C. same C. where C. then D. kinds D. finds D. play D. everyday D. happy D. longer D. such D. like D. there D. now