英语任务型阅读：More milu deer have lived in China.At present there are not many milu deer i
More milu deer have lived in China.At present there are not many milu deer in nature parks in China,but the number is increasing every day.
The milu deer is a kind of deer that used ti be common in China long ago.However,it disappeared during the Ming and Qing periods.To many of the deer had been killed and they disappeared.
At present,the biggest nature park for milu deer in chaina is the Nanhaizi Milu Park,which is zbout 20 kilometres south of Beijing.It is an _（a）___research centre for nature and wildlife .The life of the milu is being studied there.By 1993 the number of milu deer at centre had grown from 20 to more than 200.
Another centre for milu deer is in Dafeng in jiangsu.In 1985,39miliu were bought to Dafeng from Britain .Since then the number of milu deer there __（b）___greatly increased.
1.在a、b处填上适当的词
2.what centres for milu deer are mentioned in the passage?
3.找同义句：People there are studying the life of the milu.
4.找主题句.
速求.