1．那里的动物很可爱，但是人们说它们的数量在逐年减少。

The animals there are lovely，but people say that the number of them is decreasing year by year.(宾语从句)

The animals there are lovely，but it's said that the number of them is decreasing year by year.(主语从句)

2．如果不采取措施，它们会处于灭绝的危险中。

If we don't take some measures，they will be in danger of dying out.(主动语态)

If some measures aren't taken，they will be in danger of dying out.(被动语态)

3．毫无疑问，生活在安全环境中的动物更可能存活下来。

There is no doubt that animals living in safe environments are more likely to survive.(现在分词作后置定语)

There is no doubt that animals which/that are living in safe environments are more likely to survive.(定语从句)

Dear Sir/Madam，

　　I'm writing to express my opinion on how to protect the animals on the island I visited last weekend.The animals there are lovely，but it's said that the number of them is decreasing year by year.If some measures aren't taken，they will be in danger of dying out.As far as I'm concerned，laws concerning animal protection should be made to punish those illegal hunters.Besides，it is necessary to set up national reserves.There is no doubt that animals living in safe environments are more likely to survive.What's more，something should be done to raise people's awareness of protecting animals.Please help the poor animals.I am sure that they will survive with your help.

Yours，

Li Hua

Ⅰ.阅读理解

(2018·陕西安康高一上期中)