D．summers are now cooler and wetter than they were in years past

　　解析：推理判断题。根据第二段内容可知，近四十年美国中西部地区七月和八月的平均气温比前四十年的平均气温要低1华氏度而降雨量多0.33英寸。由此可知D项正确。

　　答案：D

　　8．According to the passage, irrigating more and more plants means ________.

　　A．making more space for farms and buildings

　　B．making more and more water into the air, and thus causing more rain

　　C．more farms depending on water­saving systems

　　D．using plants to change the climate

　　解析：细节理解题。根据第四段中的Plants use the water and then release it into the air可知，植物吸收灌溉的水，然后再将水释放到空气中，从而形成降雨。

　　答案：B

　　B卷

　　Ⅰ.完形填空

　　(2017·南昌二模)It was a warm March evening, and I'd just taken a seat on the bus that would take me home. It was nearly 6：00 p．m., but the bus was not yet full and the driver gave no __1__that he intended to start the bus.

　　A middle­aged woman took a seat opposite me. She was crying. Not speaking to anyone in particular, she __2__ narrated her story.

　　She had come to the city to visit her daughter. On the way to the terminal, a thief had __3__one of her bags. It had contained half of the money she'd brought with her. The other half was hidden under her blouse, so she __4__still had some money left. The bus conductor, driver, and other passengers listened to her tale.

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