判斷正誤。正確的答案涂A，錯誤的答案涂B。
   May 23 in 1981 was a big day for scientist Liu Yinzeng （劉蔭增） .He and his team found seven wild crested ibises （朱鹮） in Hanzhong，Shanxi province.
   "That night，I saw a crested ibis fly across the sky.We ran after it at once and found four adult crested ibises and three young little birds in the woods，" Liu said.
   That was the start of China's efforts to protect the birds.There are 4，400 crested ibises in China，making up most of the bird's global （全球的） population of over 5，000.It has been more than 40 years since the birds came back.
   Crested ibises are one of the oldest birds in the world.There were once lots of crested ibises in Asia.But in the 1960s，they began to disappear because of pollution and other human activities.That was why Liu and his team set out to look for the birds.They spent three years searching in 14 provinces before making their big finding.
   Chinese scientists have worked hard to study and protect the birds since then.They have asked people not to hunt （捕獵） the birds，cut down trees，or use fertilizers （化肥） in the places where the birds live.They helped the birds have more babies.Some crested ibises were also sent to Japan and South Korea.All of these countries work together to protect the birds.

（1）Seven wild crested ibises were found in 1981，by Liu Yinzeng and his team．

A

A

（2）The number of wild crested ibises is over 5，000 in China．

B

B

（3）There weren't any crested ibises left before scientists found them in Hanzhong．

B

B

（4）People are asked to improve the living environment of crested ibises．

A

A

（5）Thanks to scientists' efforts，crested ibises have avoided the danger of dying out．

A

A