第20题:[单选题]You must shine your shoes. A.lighten B.clean C.wash D.polish 参考答案:D 本句话的意思:你必须擦你的鞋子。shine意为“照亮,发光”。polish意为 “擦亮”,如:Each morning he shaves and polishes his shoes.每天早晨,他都刮脸、擦鞋。lighten 意为“发亮,照亮”,如:The sky lightened after the rain ended.雨过天晴。clean意为“清除”,如: He cleaned the dirt off the coat.他擦掉了外套上的污垢。wash意为“洗”,如:He washed the dirt off the coat.他把外套上的污垢洗掉了。