题目

阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。 Honeybee populations in the United States  (decrease) dramatically over the decades. And a new study suggests that a certain kind of pesticide could be making things  (bad). The number of honeybees hasn't changed much over the past few years, but the overall picture doesn't look good for an insect that plays  important role in our food supply. Scientists don't know for sure  this is happening. Pesticides and parasites (寄生虫) are the most suspected reasons, and a study recently published in the scientific journal. One suggests that neonicotinolds (烟碱类农药) ,types of pesticides that  (use) around the world, are incredibly poisonous to honeybees and other insects. Part of the reason for that is because these pesticides appear  (stick) around in the environment and stay dangerous for longer periods of time. Though they're deadly to insects, neonicotinolds are not considered dangerous to humans. An ongoing challenge  farmers is finding ways to keep other insects away while still  (protect) bees. Pesticides may not discriminate between the insects they kill, though neonicotinolds maker says the chemical's risk to bees is lower when it's used properly. The U. S. Department of Agriculture says it's  (likely) that there's one magic  (solve) to the problem, but there are a number of organizations trying to help honeybees. 答案：【1】have decreased/have been decreasing【2】worse【3】an【4】why【5】are used【6】to stick【7】for【8】protecting【9】unlikely【10】solution

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