第19题: [单项选择]His expenditure on holidays and luxuries is rather high in ______ to his income. A. comparison B. proportion C. association D. calculation 参考答案:B 答案解析:in proportion to/with表示“按……的比例;与……成比例”;in comparison with表示“与……相比”;in association with表示“与……联合,与……有关