题目内容：

    Scientists are trying to save Puerto Rico’s endangered Amazon parrots after Hurricane Maria destroyed the birds’ habitats and food sources(来源).

El Yunque is a large national forest on the eastern part of Puerto Rico. Just two of the 56 wild parrots that once lived there survived Maria, the Category-4 storm that struck Puerto Rico in September 2017. Scientists report other forests have seen great drops in parrot populations as well.

In the 1800s, there were more than a million of the bright green parrots living in the wild in Puerto Rico. By the 1970s, the number was down to just 13 birds after years of forest clearing.

A special program was started in 1972 to help increase the parrot population, which led to the creation of three breeding(繁殖) centers. Just weeks before Hurricane Maria hit, scientists counted 56 wild parrots at El Yunque. That was the highest number in the program’s history. Scientists say that even though several parrots have been born in captivity(笼养) and in the wild since Maria, the species is still in danger.

The Puerto Rican Amazon is the island’s only remaining native parrot. More than 460 of the birds are kept inside the breeding centers at El Yunque and the Rio Abajo forest. Scientists have not released(释放) any of the birds since Hurricane Maria. A third breeding center, in a forest in the western area of Maricao, has not been in operation since the storm.

Scientists are considering whether to catch some of the remaining wild parrots and put them in the same cage as the birds that are set to be released. This way, the captive birds can learn from the wild birds how to survive in the forests. Another consideration is to release some captive parrots in Maricao, which was not as heavily damaged by Maria.

1.Why has the parrot population greatly decreased in the past 200 years?

A. Because of Hurricane Maria.

B. Because of too much hunting.

C. Because of the loss of forests.

D. Because of lack of breeding centers.

2.Which of the following is true about Hurricane Maria?

A. It killed 56 wild parrots at El Yunque.

B. It greatly affected parrots in captivity.

C. It reduced the number of wild parrots.

D. It led to the creation of three breeding centers.

3.What can we infer about Amazon parrots in captivity?

A. They have the highest number in the history.

B. They have been released since Hurricane Maria.

C. They are used to living in the wild.

D. They are larger in number than those in the wild.

4.What is the best title for the text?

A. Scientists Work to Save Puerto Rican Parrots.

B. Amazon Parrots are in Danger of Disappearing.

C. A Special Program Helps Increase the Parrot Population.

D. Hurricane Maria Reduced the Number of Amazon Parrots.