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【题目】With the development of economy, our income has increased ______ 10% in less than a year.
A. for B. by C. on D. at
【答案】B
【解析】考查介词。句意：随着经济的发展，我们的收入一年内增加了10%。increase by 表示“增加了多少”。故选B。
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【题目】With the development of economy, our income has increased ______ 10% in less than a year.
A. for B. by C. on D. at
【答案】B
【解析】考查介词。句意：随着经济的发展，我们的收入一年内增加了10%。increase by 表示“增加了多少”。故选B。