Barges which carrier most of the heavy freight on rivers and canals are usually propelled
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Barges which carrier most of the heavy freight on rivers and canals are usually propelled by towing.
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正确答案:carrier一carry
考查词性。carrier是名词,意为“运送者;货运公司”。而此处which引导的定语从句中需要谓语动词,主语Barges是复数形式,故将carrier改为carry。
