单选题 We should be able to {{U}}keep{{/U}} balance between our incoming wages and the outgoing expenses.
【正确答案】 C
【答案解析】[分析] 形近识别 keep balance保持平衡;而A.remain保持,剩余;B.contain包含,容纳;C.maintain保持,继续存在(使某事继续下去);D.retain保持,保留(指保留或继续拥有某物)。所以答案为C。