解析　推理判断题。阅读短文可知这篇短文重点介绍了中国的空气污染问题以及空气污染的严重危害。对于政府来说迫切地需要采取行动。故选D。

　　Ⅱ.完形填空(建议用时17′)

　　In high school I had a math teacher，Mrs.Davies，who took her job seriously and expected her students to put forth the same degree of commitment.Strict but fair，she held our attention with her time­proven approach.One of her

　　9

　　was for students who were more advanced academically.I chose to

　　10

　　it and soon realized that the course was a bit over my head.I

　　11

　　with the complex problems that others seemed to learn without much effort.

　　One Friday we were tested

　　12

　　our ability to use a theorem(定理) that no one in the class thoroughly understood.The teacher would

　　13

　　our papers based on our ability to progress through the problem which easily filled two pages of formulaic notations(公式符号)．I was absolutely

　　14

　　.Finally，I didn’t use the required theorem.Instead，I decided to use more familiar theorems to arrive at an

　　15

　　.I knew I had failed because I hadn’t done the

　　16

　　assignment.I became resigned to my fate.

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