六、语法填空(共10小题,计10分)
在空白处填入一个适当的单词或括号内单词的正确形式,必要时加情态动词或助动词。
Amur tigers are interesting animals. They are the 1. ____
biggest
(big) cats in the world. A full-grown Amur tiger can be over 600 pounds. They live alone. Tigers also have very good eyesight 2. ____
and
hearing. Their eyesight is 3. ____
much
(many) better than humans'. Amur tigers live in the forests in the Russian Far East and Northeastern China. They have a thick yellow coat. It keeps 4. ____
them
(they) warm during the long, cold winters in the forest. Amur tigers 5. ____
usually
(usual) hunt at night. Sometimes these tigers travel 6. ____
hundreds
(hundred) of kilometers to look for things to eat. They hunt small animals living in the forest. They also hunt smaller kinds of bears. A hungry Amur tiger can eat more than 50 pounds in one night.
Today, Amur tigers are in 7.
danger
. The number of Amur tigers dropped 8.
fast
at the beginning of the twentieth century. Countries like Russia and China then began to protect these big cats. After that, the number of Amur tigers grew. Scientists believe there are about 540 Amur tigers living in the wild today. These big cats are still in a difficult situation. We should try 9.
to save
these tigers. If we try our 10.
best
, the tigers may live in peace in the future.