如果鯊魚(yú)的數(shù)量降至過(guò)低，就會(huì)給海洋生物帶來(lái)危險(xiǎn)。

If numbers of sharks drop ________ low, it will bring ________ to all ocean life.

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聽(tīng)下面一段材料，回答第15至第17題。

1.What does the woman want to buy for her son?

A.A story book. B.A novel. C.A geography book.

2.When is the woman's son's birthday?

A.Next Monday. B.Next Tuesday. C.Next Thursday.

3.What is the man good at?

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_________ (記住) all the numbers in seconds is impossible.

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— What do you like about Taixing?

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科目：初中英語(yǔ) 來(lái)源：甘肅省金昌市2019-2020學(xué)年九年級(jí)下學(xué)期診斷考試英語(yǔ)試卷 題型：補(bǔ)全對(duì)話(huà)7選5

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A: Environment? What do you actually mean?

B: I mean we have two main problems. One is that the rivers are badly polluted. The water is very dirty.

A: 3.

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B: You are right. 4.

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B: We should also plant more trees.

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