【题目】空缺只能的最佳词汇是
[A] with.
[B] over.
[C] for.
[D] on.
【试题】
①Pest control has been a major issue for many decades. ②And the industry has seen many evolutions and modifications over the years as it has sought out newer ways to ensure that pests are controlled and properly managed. ③The main objective of the research and implementation of new pest control strategies is to reduce the impact that pests have _______ the environment and host creatures. ④Looking forward to how pest control will have evolved in the coming years, the average farmer and pet owner can anticipate a better life because of the new methods that are being developed. ⑤More so, the newer methods are even more cost-effective than the systems currently being used. ⑥The future seems bright, for the most past, in the pest control industry as many technological innovations are being made for more effective, cheaper and safer control methods. ⑦Not only are these methods human-friendly, they are also modified to factor in environmental protection — a cause we all must fight for.
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