Question

【题目】 Mary often does some translation work to earn extra money，which (accout for) half of her income.

Answer 1

【答案】accounts for

【解析】 句意：玛丽经常做些翻译工作来赚取外快，这占了她收入的一半。account for是……的原因；解释，说明；(在数量上、比例上)占。