题目

I _______less than a pound a week when I first started work . A. used to earn B. was used to earn C. used to earning D. was used to earning 答案：A 下列物质的用途主要是由其化学性质决定的是 [　　] A．用干冰作制冷剂 B．用金刚石切割玻璃 C．用煤作燃料 D．发烧病人用酒精擦身体降温