题型：语法填空（语篇） 题类：常考题 难易度：困难
黑龙江省大庆铁人中学2020届高三上学期英语开学考试试卷
Every year, butterfly(蝴蝶) lovers in California go out in November to count monarch butterflies. They (get) a worrying result from their fall monarch count in 2018— number of monarchs had dropped by 86% since 2017.
The orange and black monarch butterflies are famous their long migrations(迁徙)—they fly thousands of miles every year. In the spring and summer they fly north; in the fall they fly south again.
Monarchs, like most butterflies, are (terrible) important for plants. They help create more plants by spreading pollen(花粉) between plants. In turn, monarchs depend on plants for food. And they depend completely on a plant called milkweed (lay) their eggs.
But monarchs have been facing growing problems for years. As more and more wild land has been turned into large farms, the monarchs have had trouble (find) enough milkweed. Many farms also use chemicals will kill insects in order to protect their plants. These chemicals also affect monarchs. Besides, pollution has made milkweed less (health) for the monarchs than it used to be.
Scientists say monarchs will be in danger of dying out in the next 20 years if nothing (do) to save them.
(thing) that people can do to help include planting milkweed, controlling the use of chemicals, protecting wild areas, and planting trees.
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