填空题 His 1 income of a year is $500. His yearly income 2 $500.It reached 3 of $500 a year.
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【正确答案】 1、total ; totals ; a total    
【答案解析】解析： His total income of a year is $500. His yearly income totals $500. It reached a total of $500 a year. 他一年总收入为500元。他的年收入总额为500。它达到了500元，每年总计。