【2010甘肃•兰州】37. I think ______ of the materials I listened to at the beginning of the exam ______ easy.
A. three fourths, is B. third four, are C. three fourths, are D. three fourth, are
答案：C
【解析】本题考查的是分数的表达法。分数的构成原则是：分子用基数词，分母用序数词，分子大于1时，分母用复数。“四分之三的材料”表达的是复数概念。故选C。
【2010四川·达州】27. ____ trees have been planted near here, so the air is very fresh.
A. Two hundreds B. Hundred of C. Hundreds of D. Hundreds
答案：C
【解析】这里考查数词。Hundred, thousand, million前有数字时，用单数形式；前面无数字修饰时，用复数，并接of 短语来修饰名词。故此题答案应选C。
