Even in small companies, computers are a(n) ______tool.A、naturalB、essentialC、c

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问题 Even in small companies, computers are a(n) ______tool.

选项 A、natural
B、essential
C、careful
D、impossible

答案 B

解析 本题考查单词辨析。essential意为“必不可少的;非常重要的”,例如:Food is essential for life.(生命离不开食物。)natural意为“自然的,天然的”,例如:In addition to natural rivers,the Chinese working people have dug many canals.(除了天然的河流之外,中国劳动人民还挖了许多运河。)careful意为“仔细的,小心的”,例如:Be careful in money matters.(在钱方面要特别小心。)impossible意为“不可能的”,例如:Such a thing is impossible.(这种事情是不可能的。)因此,根据句意B为正确选项。
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