C. Because they often listened to him read his writing.
D. Because they shared sufferings with him in his writing process.
【参考答案】39—40、CD
41—42、AD
【四川省2017“联测促改”活动模拟试题】
阅读下列短文,从每题所给的四个选项(A、B、C、D)中,选出最佳选项,并在答落卡上将该项涂黑。
Some fish may contain harmful chemicals, which can be the result of both natural causes and water pollution. Mercury (水银) is a poisonous chemical, which occurs naturally in oceans and the Earth's crust (壳), but also comes from man-made sources, such as farm chemicals, burning garbage, oil, coal, etc.
Polyclilorinated bipheuyls (PCBs), a group of chemicals, can also be found in some fish. These man-made chemicals were used in many industries until 1977, when they were banned. PCBs were released or leaked into (lie tar and water and have bear transported around the globe.
How do mercury and PCBs end up in fish and the food supply? When they arc released into the air, they attach themselves to particles(微粒).These particles settle on the ground and in the water and are eventually eater by micro-organisms. Small fish cat the micro-organisms, and large fish eat the small fish and on up the food chain.
Because they can negatively affect your health, the U.S. Eavirotunental Protectioc Agency advises that kids younger than 15 years old avoid fish that cortain high levels of mercury and PCBs. These include shark, swordfish, king rrnackerel, and tilefish.
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