[题目]Tom usually gets up half past six Saturday morning.A. at, on B. at, inC. for, in D. in, on 题目和参考答案——青夏教育精英家教网—

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【题目】Tom usually gets up _____ half past six _____ Saturday morning.

A. at, on B. at, in

C. for, in D. in, on

【答案】A

【解析】

试题分析：句意：汤姆在周六早晨6：30起床。在具体的某一个时刻用介词at；在具体的某一天早晨用介词on。故选A。

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【题目】

Many environmental groups are warning that oceans of the world are in great danger．In the past 50 years，the number of water with zero oxygen（氧气）in the open ocean has increased more than four times．In the near coast water bodies，including the river mouth and seas，low﹣oxygen areas have increased more than 10 times since 1950．Scientists discover that oxygen continues dropping ever outside these zones as the Earth warms．To stop the drop，the world needs to control in both climate change and nutrient（养分）pollution．

Oxygen is a must to life in the oceans．The drop in ocean oxygen is among the most serious effects of human activities on the Earth's environment．

This is the first time for the scientists to take such a deep look at the causes，results and solutions to low oxygen worldwide，in both the open ocean and the near coast waters．About half of the oxygen on Earth comes from the ocean．However，mixed effects of nutrient loading and climate change are greatly increasing the number and size of "dead zones" in the open ocean and the near coast waters，where oxygen is too low to support most sea life．

In the areas traditionally called "dead zones", like those in Chesapeake Bay and the Gulf of Mexico，oxygen drops to levels so low that many animals have trouble in breathing and die．As fishes run away from these zones，their living areas become smaller and smaller．But the problem goes far beyond "dead zones"．Even smaller oxygen drops can hold up the growth in animals and lead to disease or even death．Low oxygen also can cause the release of dangerous chemicals．Although a few animals can grow well in dead zones，overall biodiversity（多样性）falls．

【1】How to stop the drop of ocean oxygen in the article？

A. By controlling in both climate change and nutrient pollution around the world．

B. By taking a deep look at the causes， results and solutions to low oxygen worldwide．

C. By running away from these zones， for the living areas become smaller and smaller．

D. By cutting down the number of animals in the oceans．

【2】Why are these waters called"dead zones" from the article？

A. Because the oxygen in these areas is too low for most sea life to live．

B. Because nutrient loading and climate change are greatly increasing．

C. Because there are no animals living in these areas．

D. Because low oxygen also can cause the release of dangerous chemicals．

【3】Which of the following statements is TRUE according to the article？

A. Only a few animals living in the sea need oxygen．

B. Climate change can help cut down the dead zones．

C. Fishes grow faster and better in low oxygen areas．

D. Human activities have many serious effects on ocean environment．

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【题目】书面表达

假设你是阳光中学九年级学生李平。你的英国笔友Henry向你请教成语“守株待兔”。请你给他写一封邮件, 内容包括： (1) 描述故事；(2) 概括寓意。

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下图供参考。参考词汇：野兔（hare）；树桩（tree stump）

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