六、选词填空(每小题 1 分，满分 10 分)
从方框中选择适当的单词或短语并用其正确形式填空，每个单词或短语限用一次。
easy certain survive recent find out include build keep make protect

The Juyongguan Great Wall was first built in the Northern Wei Dynasty and rebuilt many times during the Ming Dynasty, which makes it look like what it is today. 56, a group of scientists from Chinese Agricultural University in Beijing made a study on the Juyongguan Great Wall, and they 57 an amazing fact.
Some parts of the wall 58 of stone, but some were built of “rammed earth”, which is a mixture of rocks and soil. Usually, rammed earth should be destroyed 59 by wind and rain over time. However, the fact is not like that. So, scientists questioned how rammed earth managed 60 for such a long time. And now they have found that parts of the wall have been protected by something called biocrust. This is a thin layer of plant life, 61 moss(苔藓), lichen(地衣)and other things.
The scientists examined a 370-mile-long section of the wall and found that the parts covered in biocrust remained better than other parts. The scientists took some samples(样本)of the biocrust back to their lab for testing. They found the natural material was actually much stronger against the rain and wind than the rammed earth. This means that the wall 62 itself well with the biocrust over the years. The biocrust is likely the key to 63 the ancient rammed earth structure intact(完好无损的)for centuries.
These findings could be important. Although biocrust may not look attractive, its natural ability to protect things can 64 be a very useful tool. The biocrust offers the experts who manage ancient 65 a good way to protect them.
56. 57. 58. 59. 60.
61. 62. 63. 64. 65.

56. Recently 57. found out 58. were made 59. easily
60. to survive 61. including 62. has protected 63. keeping
64. certainly 65. buildings

【分析】
我们可以逐个空结合语境、词性要求和固定搭配来分析：
1. 第56空：句子开头需要一个副词修饰整个句子，描述研究发生的时间，结合所给单词“recent”，将其变为副词形式“Recently”，表示“最近”，符合语境。
2. 第57空：前文提到科学家做研究，此处应表达“发现”一个惊人事实，“find out”有“查明、发现”之意，且前文谓语“made”为过去式，所以用“found out”。
3. 第58空：表达“墙的部分由石头制成”，固定搭配“be made of”表示“由……制成”，主语“some parts”为复数，且描述过去的建造情况，所以用“were made”。
4. 第59空：需要副词修饰动词“destroyed”，说明夯土被破坏的状态，“easy”的副词形式“easily”表示“轻易地”，符合语境。
5. 第60空：固定搭配“manage to do sth.”表示“设法做成某事”，此处表达夯土设法留存很久，所以用“survive”的不定式形式“to survive”。
6. 第61空：前文介绍生物结皮是植物层，后文列举苔藓、地衣等，需要一个词表示“包括”，“including”符合语境，用来举例。
7. 第62空：时间状语“over the years”提示用现在完成时，主语“the wall”为单数，表达墙用生物结皮自我保护，所以用“has protected”。
8. 第63空：固定搭配“the key to doing sth.”中“to”为介词，后接动名词，此处表达“保持结构完好”，所以用“keep”的动名词形式“keeping”。
9. 第64空：需要副词修饰系动词“be”，强调生物结皮的保护能力当然是有用工具，“certain”的副词形式“certainly”符合语境。
10. 第65空：形容词“ancient”后接名词，表达“古代建筑”，“build”的名词复数形式“buildings”符合语境，因为是泛指古代建筑。
【解析】
56. Recently：此处需副词作状语修饰整个句子，将形容词“recent”变为副词形式“Recently”，表示“最近”，符合研究发生的时间语境。
57. found out：根据前文“made a study”可知用一般过去时，“find out”表示“发现”，其过去式“found out”对应“发现惊人事实”的语境。
58. were made：固定搭配“be made of”表示“由……制成”，主语“some parts of the wall”为复数，且描述过去的建造情况，故用一般过去时的被动语态“were made”。
59. easily：此处需副词修饰动词“destroyed”，将形容词“easy”变为副词“easily”，表示“轻易地”，说明夯土本应轻易被风雨破坏。
60. to survive：固定搭配“manage to do sth.”表示“设法做成某事”，所以用“survive”的不定式形式“to survive”，表达夯土设法留存许久。
61. including：此处用介词“including”表示“包括”，用来列举生物结皮包含的成分，符合语境。
62. has protected：时间状语“over the years”提示用现在完成时，主语“the wall”为单数，所以用“has protected”，表示多年来墙的自我保护状态。
63. keeping：固定搭配“the key to doing sth.”中“to”是介词，后接动名词，故将“keep”变为动名词“keeping”，表示“保持古代夯土结构完好”。
64. certainly：此处需副词修饰系动词“be”，将形容词“certain”变为副词“certainly”，表示“当然”，强调生物结皮保护能力的实用性。
65. buildings：形容词“ancient”后接名词，将动词“build”变为名词“building”，且此处表泛指，故用复数形式“buildings”，表示“古代建筑”。
【答案】
56. Recently 57. found out 58. were made 59. easily
60. to survive 61. including 62. has protected 63. keeping
64. certainly 65. buildings
【知识点】
1. 词性转换
2. 固定搭配
3. 时态语态
【点评】
这道选词填空题重点考查学生对词汇的综合运用能力，涵盖词性转换、固定搭配以及时态语态的判断。解题时需紧密结合语境，同时注意单词形式的正确变化，既要理解每个词汇的含义，又要掌握相关语法规则，对学生的语言基础和语境分析能力有一定要求。
【难度系数】
0.6