第30题: [单项选择]The doctor assured Susan that the pain would ______ one hour after she took the medicine. A. wear out B. wear down C. wear away D. wear on 参考答案:C 答案解析:[解析] wear out意为“使……逐渐消失,使……磨损掉”,后面必须出现宾语,而wear-away虽然与其意义相同,但后面不带宾语,故是正确的。wear down意为“使意志等……减弱,使……变弱