Ⅰ. Read and remember the key words and expressions in Unit 2.
camp, international, admit, spare, degree, manage, idiom, uniform, especially, education, president, vacation, schedule, ...

此题为词汇记忆题，无需解题步骤，直接呈现已知内容（关键词汇和表达）即可：
camp, international, admit, spare, degree, manage, idiom, uniform, especially, education, president, vacation, schedule

Ⅱ. Write down the English words according to the explanations.
1. n (connecting with a whole country and its people)
2. w (anything or everything)
3. e (an interesting experience that teaches you something)
4. p (having the colour of red and blue mixed together)
5. v (a holiday or time spent not working)
6. e (daily)
7. a (agreeing that something which is generally considered bad or wrong is true or has happened)
8. f (not succeed)
9. i (connected with two or more countries)
10. s (free)

1. national 2. whatever 3. experience 4. purple 5. vacation 6. everyday 7. admit 8. fail 9. international 10. spare

1. 解释为“与整个国家及其人民相关的”，以n开头，应为national。
2. 解释为“任何事物或所有事物”，以w开头，应为whatever。
3. 解释为“教你东西的有趣经历”，以e开头，应为experience。
4. 解释为“红和蓝混合的颜色”，以p开头，应为purple。
5. 解释为“不工作的假期或时间”，以v开头，应为vacation。
6. 解释为“日常的”，以e开头，应为everyday。
7. 解释为“承认普遍认为不好或错误的事情是真的或已发生”，以a开头，应为admit。
8. 解释为“不成功”，以f开头，应为fail。
9. 解释为“与两个或多个国家相关的”，以i开头，应为international。
10. 解释为“自由的”，以s开头，应为spare。

Ⅲ. Complete the sentences according to the first letter or the Chinese meanings.
1. There are many i in English language. For example, “It’s raining cats and dogs” means “It’s raining heavily”.
2. The students in Shenzhen have to wear u when they go to school.
3. The United States of America is made up of fifty (州) such as Alaska/AK, Alabama/AL and California/CA.
4. In the end, the thief was caught and (承认) stealing a great number of things from the mall.
5. Last week, I read a book about the stories of American (总统) in history.

1. idioms
2. uniforms
3. states
4. admitted
5. presidents

1. 根据题目“It’s raining cats and dogs” means “It’s raining heavily”.可知此处表达的是英语中有许多“习语”，结合首字母提示可知应填入“idioms（习语、成语）”，故答案为idioms。
2. 根据题干The students in Shenzhen have to wear u____ when they go to school. 可知深圳的学生上学必须穿...，结合首字母提示，可联想到“uniforms（校服）”，wear uniforms穿校服，故答案为uniforms。
3. 根据题干及汉语提示，可知“州”的英文为“state”，是可数名词，fifty后接名词复数，故答案为states。
4. 根据题干及汉语提示，可知“承认”的英文为“admit”，根据was caught and____（承认）可知此处and连接的是两个并列的过去式动作，故答案为admitted。
5. 根据题干及汉语提示，可知“总统”的英文为“president”，是可数名词，美国历史上的总统不止一个，所以应用其复数形式，故答案为presidents。