Every year from late May to early June, routine banding work for Beijing swifts (雨燕) is carried out at the Summer Palace. This year, a total of 89 swifts received careful physical examinations and ___1___ (profession) banding. Using harmless mist-netting skills, staff ___2___ (gentle) caught the birds and moved them to inspection stations. Specialists fitted each swift with a unique numbered metal leg band from China’s National Bird Banding Center and recorded key biological data like body weight and length before ___3___ ( release) them back to the wild.

Bird banding is a vital scientific method ___4___ (track) migratory birds’ routes, life cycles and population changes. Since the 1990s, researchers have stuck ___5___ this annual program at the palace’s Kuoru Pavilion. Among the 89 banded swifts this year, 23 were new individuals while 66 were recaptured ones, ___6___ (mark) a 74 percent recapture rate. The high rate proves that Beijing swifts are highly loyal to their nesting sites and enjoy a stable living environment with steady population reproduction.

For decades, Beijing swifts have chosen the Summer Palace as their ideal habitat. They complete an amazing 10,000-kilometer ___7___ (migrate) yearly: traveling from southern Africa to Beijing in mid-April to nest under ancient building eaves (屋檐), breed and raise chicks, before flying back south in July and August. Kunming Lake is rich in insects, providing sufficient food for ___8___ (they) young.

As a precious ecological and cultural symbol, Beijing swifts inspired Nini, a mascot for the 2008 Beijing Olympics, and served for the Beijing Central Axis’ World Heritage application. To protect them, the Summer Palace ___9___ (adopt) closed protection measures since 2019. It also trains patrol (巡逻) staff to rescue fallen young swifts and holds public education activities annually to raise ___10___ (aware) of bird protection.

1.1.

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解析：选professional。professional 考查形容词。题空后为名词 banding，需用形容词修饰名词，profession 的形容词形式为 professional。故填 professional。

2.2.

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解析：选gently。gently 考查副词。题空修饰动词 caught，需用副词作状语，gentle 的副词形式为 gently。故填 gently。

3.3.

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解析：选releasing。releasing 考查非谓语动词。介词 before 后接动词时，需用动名词形式作宾语。故填 releasing。

4.4.

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解析：选to track。to track 考查非谓语动词。固定搭配 a method to do sth，表示 “做某事的方法”，不定式作后置定语修饰 method。故填 to track。

5.5.

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解析：选to。to 考查介词。固定短语 stick to，意为 “坚持”。故填 to。

6.6.

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解析：选marking。marking 考查非谓语动词。逗号前完整句子，题空为结果状语，前面整件事与 mark 是主动关系，用现在分词。故填 marking。

7.7.

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解析：选migration。migration 考查名词。题空前 10,000-kilometer 为复合形容词修饰名词，migrate 的名词形式是 migration。故填 migration。

8.8.

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解析：选their。their 考查形容词性物主代词。题空后有名词 young，需用形容词性物主代词修饰，对应主语 they。故填 their。

9.9.

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解析：选has adopted。has adopted 考查动词时态。时间状语 since 2019 是现在完成时标志，主语 the Summer Palace 为单数，助动词用 has。故填 has adopted。

10.10.

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解析：选awareness。awareness 考查名词。动词 raise 后需接名词作宾语，aware 的名词形式为 awareness。故填 awareness。