1. Apple is a () word.

　　A. five-letter B. five-letters C. fives-letters D. five letters (D)

　　2. All the() in the hospital got a rise yesterday.

　　A. women doctors B. woman doctors C. women doctor D. woman doctor (A)

　　3. After ten years, all those youngsters became() .

　　A. growns-up B. growns-up C. grown-up D. grown-ups (D)

　　4. The police investigated the () about the bank robbery.

　　A. stander-by B. standers-by C. stander-bys D. standers-by (B)

　　5. She used to have three () .

　　A. boys friends B. boys friend C. boy friends D. boy friend (C)

　　1～5为复合名词的复数。

　　※ 有“-”连字符的，在其名词部分后加S ，如 five-letters ,standers-by ,lookers-on ; 无名词部分的 , 在复合词后如S ，如 grown-ups ,sit-ins ;

　　※ 由man或woman作为第一部分的复合名词表职位时，均用复数，如men doctors ,women writers ;

　　※ 由boy或girl 作为第一部分的复合名词，要在最后词后加-S，如boy friends , girl friends ;

　　6. The committee() been arguing about the economic problems among themselves for many hours.

　　A. have B. has C. could have D. can have (A)

　　※ 集体名词被看作若干个体时，具有复数概念;被看作一个整体时，具有单数概念。这类词有：family ,government ,

　　class , surrounding , committee ,club , company ;

　　7. Seventy percent() illiterate in that area.

　　A. is B. are C. is to be D. can have (B)

　　8. His trousers () in his suitcase.

　　A. is always kept B. are kept always C. are always kept D. have always been (C)

　　具有“成双”含义的词，如服装类、工具类的词：trousers. glasses . scissors(剪刀)，系动词用复数。

　　9. The young couple bought() for their living room.

　　A. some new furniture B. some new furnitures

　　C. many new furniture D. many new furnitures (A)

　　Furniture 家具，不可数名词。Many 修饰可数，much 修饰不可数，some ,any 都可修饰，但any

　　用在疑问和否定句中. a few 修饰可数，肯定含义;a little 修饰不可数，否定义。

　　10. Mathematics () easy to learn.

　　A. is B. are C. can D. feels (A)

　　学科类的词，如maths , economics , politics , electronics ,mechanics(力学)等，含有复数概念。