I.                    根据下列各句句意及所给单词的首字母或汉语提示，写出该单词的正确形式。

1.       There were some photos of ________(野生动植物)in the document.

2.       He still _________ (保留)his opinion on some points.

3.       They are pulling their troops out of the battle z________.

II.                 用所给单词的适当形式填空。

1.       She put on dark glasses as a ______ (protect) against the strong light.

2.       Many parents feel a sense of ________ (lose) when their children leave home.

3.       Winter is te best time for ________(hunt) in mountain areas.

4.       There has been a steady _________(decrease) in population in this city.

III.               完成句子。

1.       If theie habitat___________(受到了威胁) or they cannnot find enough food, their numbers __________(就会减少)

2.       _________(因此) these endangered animals _____________(甚至有可能灭绝)

3.       This is ____________________(野生动物保护所包括的).

4.There_________________________(在挽救濒临灭绝的野生动物方面已经取得了一些进步) endangered wildlife in China.

5.______（丧失）of bamboo growing areas.6.Wolong Nature __________(保护区)

7.too much _________(打猎)in the 1950s8.Baishanzu _________________(国家自然保护区)

9.about 30-40 remain ________________________(被禁猎后)

10.Why are they _________________________(有消失的危险)？