五、阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。选项中有两项为多余选项。
主题群:环境保护 子主题:环保行为 语篇类型:说明文 难度:★★★
While studying a map of China, have you ever noticed the Mu Us Desert(毛乌素沙漠) in the northwest? If you haven't, then you probably never will. 1.
Why is this happening? Who is the "killer"? Well, this is not a murder(谋杀) story. It is, instead, the result of years of efforts of tree planting. 2. Sandstorms were common in northern Shaanxi. Lots of people had to leave their homes.
The fight against desertification(沙漠化) began in the late 1950s. The work was more than tiring. Shi Guangyin led a team to plant trees in Bulanghe, a town in Yulin, Shaanxi. 3. That night, however, a strong wind blew away all the young trees. Crying was useless. The next day, the team replanted all the trees.
4. One of them is Guo Chengwang. With encouragement from the government, in 1985, he started to plant trees in his village. His children, grandchildren and great-grandchildren have continued the job.
These trees have made a big difference. 5. With continuous efforts, the Mu Us Desert will be gone. Our motherland is becoming greener and lovelier.
A. They once spent the whole afternoon planting trees under the burning sun.
B. In Yulin, the number of sandy days has increased a lot since then.
C. In Yulin, the number of sandy days has dropped from 100 in 2000 to 10 now.
D. The Mu Us Desert used to be one of the largest deserts in China.
E. There used to be few sandstorms in northern Shaanxi.
F. That's because the desert is becoming smaller and smaller.
G. In Yulin, there are many other sandstorm fighters.

1. F 2. D 3. A 4. G 5. C

【分析】
本题为英语七选五题型，解题思路为：先通读全文把握主题（毛乌素沙漠的治理过程与成果），再逐一分析每个空白处的上下文逻辑、语义衔接关系，结合选项排除多余项选出最佳答案。具体步骤：1. 第1空需解释“从未注意到沙漠”的原因，对应沙漠变小的表述；2. 第2空需衔接后文“沙尘暴频发”，介绍沙漠过去的状况；3. 第3空需衔接“种树的辛苦”与后文“大风毁树”，体现种树的具体场景；4. 第4空需引出后文的另一位治沙人，说明存在其他治沙者；5. 第5空需衔接“树木带来的改变”，填入治沙的具体成果数据。
【解析】
1. 第1空：前文提到“you probably never will（你可能永远不会注意到）”，后文询问原因，F选项“That's because the desert is becoming smaller and smaller（那是因为沙漠正变得越来越小）”符合因果逻辑，衔接自然；
2. 第2空：后文“Sandstorms were common in northern Shaanxi（陕北北部沙尘暴常见）”说明此处需介绍毛乌素沙漠过去的规模，D选项“The Mu Us Desert used to be one of the largest deserts in China（毛乌素沙漠曾是中国最大的沙漠之一）”符合语境；
3. 第3空：前文“Shi Guangyin led a team to plant trees（石光银带领团队种树）”体现种树的任务，后文“a strong wind blew away all the young trees（大风刮走所有树苗）”，A选项“They once spent the whole afternoon planting trees under the burning sun（他们曾在烈日下花了整个下午种树）”体现种树的辛苦，衔接上下文；
4. 第4空：后文“One of them is Guo Chengwang（其中一位是郭成旺）”说明此处需引出其他治沙者，G选项“In Yulin, there are many other sandstorm fighters（在榆林还有许多其他治沙斗士）”符合；
5. 第5空：前文“These trees have made a big difference（这些树带来了很大改变）”，后文“the Mu Us Desert will be gone（毛乌素沙漠将消失）”，C选项“In Yulin, the number of sandy days has dropped from 100 in 2000 to 10 now（榆林的沙尘天数从2000年的100天降到现在的10天）”是具体治沙成果，符合逻辑。
【答案】
1.F 2.D 3.A 4.G 5.C
【知识点】
英语阅读理解（七选五）、上下文逻辑衔接
【点评】
本题围绕环境保护主题，考查学生对语篇上下文逻辑关系的理解与运用能力，需结合语境、语义衔接解题，难度适中。
【难度系数】
0.6