We went to Tibet to observe Tibetan antelopes with Zhaxi as our guide. Luckily, on the plain in front of us, we saw a herd of antelopes     1    (move) slowly across the green grass. These beautiful animals reminded me     2    the danger they are in because every year many of them are hunted     3    (legal) for their valuable fur. Especially in     4    1980s and 1990s, their population dropped by more than 50 percent. In order     5    (save) this species from extinction, the Chinese government placed it under national protection and set up the Changtang National Nature Reserve    6    Zhaxi works. These measures were     7    (effect) and the antelope population     8    (have) recovered. However，the government doesn’t intend to stop the protection programmes, since the threats to the Tibetan antelopes     9    (not disappear). Only when we learn to exist in harmony with nature     10    we stop being a threat to wildlife and to our planet.