1. 通常用单数名词作定语

cotton goods棉织品

inquiry office问事处

history teacher 历史老师

paper factory 纸厂

telephone number 电话号码

test paper考卷

weather forecast天气预报

welcome speech欢迎辞

All difficulties are also paper tigers.

一切困难也都是纸老虎。

He is one of the most successful newspaper writers in the city.

他是市里最成功的记者之一。

【说明】“数词+名词”作定语时，其中的名词也要用单数形式。如：

He has an 11-year-old daughter. 他有一个11岁的女儿。

I was told to write a 5000-word article in an hour. 要我在1小时内写一篇5000字的文章。