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英语四级备考路上，选词填空作为检验词汇精准度与语境理解力的关键环节，是每位考生不可忽视的试炼场。通过这一题型，我们不仅能巩固词汇基础，更能提升在复杂语境中灵活运用的能力。以下，我们以“化学物质污染”为英语四级选词填空真题示例，深入探讨这种练习在备考过程中的独特价值。

英文原文

Timothy, a 54-year-old Alaskan fisherman, used to think he was safe from industrial pollutants at his home in Haines, a town with a population of 2,400 people and 4,000 eagles, with 8 million acres of protected wildland nearby. But in early 2021, Timothy agreed to take part in a biomonitoring project, in which people’s blood and urine were tested for ______ of chemicals. In this case, three potentially dangerous classes of compounds were found in common household items like face cream, tin cans, and shower curtains. The results, published in November in a report called “Is It in Us?” by an environmental group, were rather worrying. Everyone of the participants, ______ an Illinois state senator to a Massachusetts minister, tested positive for all three classes of pollutants. While the ______ presence of these chemicals does not necessarily indicate a health risk, the fact that typical Americans carry these chemicals at all shocked Timothy and his fellow participants.

选词选项

A. traces
B. range
C. belong
D. demonstrated
E. excess
F. extending
G. habitually
H. necessarily
I. products
J. from
K. released

文章概要

本文讲述了一位阿拉斯加渔民Timothy参与一项生物监测项目，该项目检测了参与者的血液和尿液中的化学物质。结果令人担忧，所有参与者都被检测出含有三种潜在有害的家庭用品中的化学物质。尽管这些化学物质的微量存在不一定会造成健康风险，但它们的普遍存在还是震惊了所有参与者。

填空及答案解析

填空位置：people’s blood and urine were tested for ______ of chemicals.

答案：I. products

解析：此处需要填入的词应该与“chemicals”相关，并且能表示这些化学物质来源于哪里。根据语境，这些化学物质来源于日常用品，因此“products”是最合适的选项。

填空位置：Everyone of the participants, ______ an Illinois state senator to a Massachusetts minister, tested positive for all three classes of pollutants.

答案：J. from

解析：此句需要一个介词来连接“an Illinois state senator”和“a Massachusetts minister”，表示参与者的范围从某一位到另一位。根据语境，“from...to...”表示范围，是合适的选项。

填空位置：While the ______ presence of these chemicals does not necessarily indicate a health risk...

答案：E. excess

解析：此句需要描述这些化学物质的存在状态，并且这种状态与“不一定会造成健康风险”相对照。根据语境，“excess”表示过量，但此处并非指真正的过量，而是强调它们的存在状态，故为合适选项。

通过以上解析，可以看出英语四级选词填空不仅考察词汇知识，还涉及对文章整体内容的理解和逻辑推理能力。希望这个示例能够帮助你更好地准备英语四级考试。