第52页
A1-8 dfgb  heca
B 1 It is a successful story about protecting Tibetan antelopes
  2 The environment is bad
第54页
1 F Very few people live in the Qinghai-Tibet Plateau.
2 T
3 F The government has taken steps to slow down tourism.(原文第四段末尾)
4 T
C2 1 For their soft and highly prized wool
    2 To make sure they are protected from poachers and other wild animals
   3 Yes. It can help to protect the environment
第56页
A1-6 at birth, weight, danger, adult, on his own  wild
B 2 clever enough to beat everyone else
  3 wise of her to go to bed early
  4 silly of me to study till 1:30 a.m.
 5 stupid of me to get up at 4:30 a.m.
 6 early to study for two more hours
 7 tired enough to fall asleep in the test
第57页听力 略
第58页
1F Knut died in 2011
2 F Knut's mother didn't want to take care of the poor cubs
3 T
4 F Knut ate milk and fish oil
5 T
6 F …… Because he was so cute that many photos of her were in the major newspapers and on the Internet.
第59页
1-8  baba    cdaa （译文请您浏览最近一篇文章）
第61页
1-7 throw rubbish  local factories, squirrel, water, feels, better, Plant a tree, Grow flowers
C2 1 Because big rivers can provide enough water and food for wildlife
  2 I can plant trees,grow flowers  provide food to help look after local wildlife
第63页
   the lion can be moved into a larger cage. It's important for it to have more place to move. As for the tiger, it's no problem that it always keeps in the afternoon in summer. But it is a big problem that people feed the fish. We will put up notice near the aquarium, saying"Don't feed the fish".
   To save the problem of restaurants, the zoo can put four new rubbish bins near them.