题型：语法填空（语篇） 题类：常考题 难易度：困难
广东省梅州市2019-2020学年高二下学期期末考试英语试题
Chickens are excellent natural enemies of locusts (蝗虫). On average, one chicken can catch over 600 locusts a day and can cover 0. 6 acre of grassland.
(official) in China's Xinjiang have handed out over 2, 200 chickens to local farmers, (hope) to control locusts. There has been a decline in the locust population in several counties the measure has been adopted.
A report predicted (high) than normal incidents of locusts for the northern part of China, (main) owing to warmer winter temperatures. Nearly 10, 000 acres in Wushi County have already been destroyed by locusts.
Previous efforts to kill locusts in Xinjiang included pesticides that, while effective, also (end) up killing off beneficial insects and harming the ecosystem. Alternatively, only 100 chickens last year in Wushi County were able to effectively limit damage more than 1, 300 acres.
This isn't the first time China (use) birds against locusts. A Telegraph story described how the government trained 700, 000 chickens and ducks (run) after and consume locusts at the sound of a whistle. The campaign, which included nearly 280, 000 people, was a response to the country's worst locust outbreak inquarter century.
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