【答案】Christie was one of my best friend at high

改错题。

Christie was one of my best friend at high school

At that time, we often spend time together.

Thank to her help, I made great progress in my

study. Last year, he decided to study abroad. In

other words, we would be separated for long time.

Before her leaving off, I prepared a gift to show

my best whishes to him. She said it was the best

gift she has ever had. From then on, we've

kept touch with another through e-mails. I

look forward to see her again in the near future.  
答案
1. friend→ friends   2. spend→spent   3. Thank→Thanks   4. he-she  5. for∧long-a

6. 去掉off   7. him→her   8. has→had   9. kept ∧in-touch   10. see→seeing
知识点
可数名词及其单复数的定义

可数名词：

是指能以数目来计算，可以分成个体的人或东西；因此它有复数形式，当它的复数形式在句子中作主语时，句子的谓语也应用复数形式。

1）以y 结尾的专有名词，或元音字母+y结尾的名词变复数时，直接加s变复数：

如：　two Marys　　　　 the Henrys

monkey---monkeys　holiday---holidays

比较：层楼：storey---storeys　 story---stories

2）以o 结尾的名词，变复数时：

a. 加s，如： photo---photos　　piano---pianos

b. 加es，如：potato--potatoes　tomato--tomatoes

c. 均可，如：zero---zeros / zeroes

3）以f或fe 结尾的名词变复数时：

a. 加s，如： belief---beliefs　roof---roofs

safe---safes　 gulf---gulfs；

b. 去f,fe 加ves，如：half---halves

knife---knives　leaf---leaves　wolf---wolves

wife---wives　life---lives　thief---thieves；

c. 均可，如：handkerchief:

handkerchiefs / handkerchieves

2、可数名词复数的不规则变化

1）child---children　foot---feet　tooth---teeth

mouse---mice　　　man---men　 woman---women

注意：与 man 和 woman构成的合成词，其复数形式也是 -men 和-women。

如：an Englishman，two Englishmen. 但German不是合成词，故复数形式为Germans；Bowman是姓，

其复数是the Bowmans。