阅读下面短文，在空白处填入合适的词或用括号中所给词的适当形式填空。

Do you know Sichuan River Boatman’s Chants (川江号子)? It is a traditional folk singing art and an important part of Chinese river music. These songs have ____1____ history of more than one thousand years. In the old ____2____ (day), many trackers (纤夫) worked along the Yangtze River. To make their work easier, they sang simple and loud songs while ____3____ (work). These songs were full ____4____ hope. They show how hard the trackers worked and how they faced difficulties ____5____ (brave).

As time ____6____ (go) by, few people need to work as a tracker for a living. The old songs ____7____ gave the trackers power in hard times are disappearing. But local people try their best ____8____ (save) the special culture. With their hard work, this old folk art has been shining on big stages and is listed as a ____9____ (nation) intangible cultural heritage (国家级非物质文化遗产).

Nowadays, many teachers teach the songs in schools. Therefore, this art ____10____ (know) to more and more teenagers and they begin to love the traditional folk singing art.

1.1.

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D

解析：选a。1.a 【固定搭配】have a history of… 有…… 的历史。

2.2.

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解析：选days。2.days 【名词复数】in the old days 在过去，固定短语，day 用复数。

3.3.

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解析：选working。3.working 【非谓语】while working = while they were working，省略主语 + be 动词。

4.4.

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D

解析：选of。of 【固定搭配】be full of 充满……。

5.5.

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D

解析：选bravely。bravely 【副词】修饰动词 faced，用副词，brave 的副词形式 bravely（勇敢地）。

6.6.

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解析：选goes。6.goes 【时态主谓一致】as time goes by 随着时间流逝，固定句式；time 为单数，一般现在时，谓语用 goes。

7.7.

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解析：选that/which。that/which 【定语从句关系代词】先行词 the old songs（物），从句缺主语，用 that 或 which。

8.8.

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解析：选to save。to save 【非谓语】try one’s best to do sth. 竭尽全力做某事。

9.9

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解析：选national。9.national 【形容词】修饰名词 heritage，nation 变形容词 national（国家的）。

10.10

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解析：选is known。10.is known 【被动语态】be known to sb. 为某人所熟知；主语 art 单数，一般现在时，故 is known。