单选题
His expenditure on holidays and luxuries is rather high in ______ to his income.
A. comparison B. proportion C. association D. calculation
【正确答案】
B
【答案解析】[解析] 固定搭配题。in proportion to为固定搭配，意为“按着……的比例，与……成比例”；in comparison with为固定搭配，意为“与……比较起来”；in association with为固定搭配，意为“与……有关联”；calculation没有类似的固定搭配。所以选B。