It’s always great to hear news about wildlife returning to w

It’s always great to hear news about wildlife returning to where they once lived. For the first time in 8 years the small blue --- British’s smallest butterfly--- has been seen back at a nature reserve in Hertfordshire.
This nature reserve has had a lot of work done recently in order to help butterflies. Management of the land has included bringing in sheep to keep the grass under control in a more natural way and planting wild flowers for butterfly species. The nature reserve is home to a number of butterfly species. In fact the way that this reserve has been managed means that it is probably the best reserve in Hertfordshire to see butterflies with at least 25 species now living in the area.
There are a number of threats to British butterflies and the greatest threat is the loss of their habitat. Changing farming practice has affected British native butterfly species greatly with many more now being at risk. Butterflies are such an excellent species that they can clearly tell the situation of local environment because they are easily influenced by environmental changes, A wide species of butterflies will generally mean a healthy environment.
The type of land management at the nature reserve in Hertfordshire offers a hope for many species of butterfly to live as usual. Butterflies need all the help they can get at the moment. Although the number of butterflies is beginning to increase, many are still at risk.
小题1:What has the nature reserve done to help butterflies return ?
a. changing the reserve place     b. bringing in sheep
c. planting wild flowers         d. changing farming practice

A．a.b

B．c,d

C．a,d

D．b,c

小题2:Why did the butterflies fly away eight years ago？

A．The weather is changing	B．The flowers have died out
C．Their habitat has been lost.	D．The environment has changed

小题3:What can we infer from the passage?

A．The environment has changed healthier a lot than before.

B．All the butterflies have returned to the reserve.

C．There is no threat to the British butterflies.

D．Over 25 species is living in the reserve now.

小题4:What does the underlined sentence mean?

A．The butterflies changed as the environment changed.

B．Butterflies are very beautiful.

C．Butterflies are sensitive to the environment the live.

D．Butterflies can tell us what is happening.