英语：Module6《Animal in danger》单元测试（外研版必修5）

Period Two

Step 1. Language points in introduction：

1. Thanks to scientists’ hard work, the number of the pandas living in the wild has increased to about 1,590.

      thanks to 多亏，由于  because of， as a result of，

      e.g. Thanks to the firefighters， people were saved in the fire.

2. Every year thousands of wild animals and plants become extinct.

       extinct    adj.  (生物等)已灭绝,已绝种的

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