数 词　　　　基数词及其用法；序数词的构成及其用法；分数词的构成；小数的用法。

　　考试重点

　　基数词可以和其他词一起构成合成形容词，在句子中作定语，名词不能加s。

　　数词部分需特别注意dozen， hundred， million， billion 等词。表示具体数字时，这些词用单数形式，表示不具体的数字时，须用dozens of， hundreds of 这类的结构。

　　I want three dozen of these。

　　He has been there dozens of times。

　　It is reported that _____ people in this area were saved in the storm。

　　A. hundred B. hundred of C. hundreds of D. some hundreds

　　当数词与名词及其他词构成合成形容词时，合成形容词中间若用连字符，则其中的名词须用单数形式。

　　The homework for the next period is to write a two-hundred-word composition about your hometown。

　　Mary is a eleven-year-old girl。

　　(Mary is eleven years old。)

　　典型例题

　　1. In ______ century computers will be used more widely。

　　A. twenty-one B. the twenty-one C. twenty-first D. the twenty-first

　　2. The meeting will be held in _______ 。

　　A. 112 Room B. Room 112 C. the 112 Room D. the Room 112

　　3. The Great Wall of China is about 6，700 _______。

　　A. kilometer long B. kilometers long

　　C. kilometer longer D. kilometers longer

　　4. “How many presidents were there before Abraham Lincoln?”

　　“Fifteen， so he was ______。”

　　A. the sixteen president B. the sixteenth president

　　C. president sixteen D. president the sixteenth

　　5. “What did the professor tell you to do?”

　　“I had to write a ______ report. ”

　　A. two thousand words B. two-thousands-word

　　C. two-thousand-word D. two-thousand words

　　6. “Did you buy anything at the clothing sale?”

　　“Yes， I bought three _____ ties for just twelve dollars。”

　　A. five dollars B. five-dollars C. five-dollar D. fifth dollar

　　7. Eight minus three _______ five。

　　A. leave B. leaves C. left D. has left

　　8. What date is it ? Its ________。

　　A. July twentieth-first B. July the twenty-first

　　C. the twenty-first of July D. Both B and C

　　9. When he was in his ________， he got the chance to go abroad to study。

　　A. forty B. fortys

　　C. fortys years old D. forties

　　10. “Rex told me you have moved。”

　　“Yes， into a _______。”

　　A. two-storey house B. house of two story

　　C. house of two stories D. two-stories house

　　11. “I would like to register this letter。”

　　“Please go to _______ on your left。”

　　A. third window B. window third

　　C. the window three D. the third window