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师梦圆初中英语教材同步人教版九年级全一册Section A Grammar focus 4a—4c下载详情
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8.海洋生态系统

different kinds of pollution

the bottom of the river

throw litter into the river

play a part in

in southern China

be harmful to

at the top of

the ocean’s ecosystem

Revision

Translate these sentences into English. ① 甚至是河底都满是垃圾。

Even the bottom of the river was full of rubbish.

② 这个方法不仅残酷还对环境有害。

This is not only cruel, but also harmful to the environment.

③ 鲨鱼处于海洋食物链的顶部。

Sharks are at the top of the food chain in the ocean’s ecosystem.

④ 许多人相信鱼翅对健康有好处。

A lot of people believe that shark fins are good for health.

Go through the conversations and a short passage in Section A quickly and find some important sentences and read aloud.

We are trying to save the earth.

Present progressive

The river used to be so clean.

used to

The air is badly polluted.

Passive voice

No scientific studies have shown that sharks fins are good for health.

Present perferct

We should save the sharks.

Model verbs

Grammar Focus

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