A Read the magazine article about using phones in public and complete it using enough, too, enough to and too ... to.
Did you know that the average American checks their phone 205 times a day? These days, we check our phones in (1) many places—restaurants, theatres, public transport, you name it, and many of us do it (2) often. That's why it's important to think about good manners when we use them. Here are some tips for using your phone politely in public.
In restaurants, keep your phone on silent and don't check it when eating. Be polite (3) think about the people at your table. They want your attention. Don't be (4) busy with your phone talk to them.
On public transport, it's fine to check your phone, as long as you show (5) respect for other passengers. If you need to make a call, always use earphones and don't speak (6) loudly.
We often use our phones to take photos in public, but sometimes strangers end up in our photos by accident. Since not everyone likes having their photo posted online, be respectful (7) avoid sharing photos of strangers.
Phones are part of everyday life—but good manners should be too. Enjoy your phone—but when you are using it in public, be thoughtful (8) show respect for others.

（1）too
（2） too
（3）enough to
（4）too; to
（5）enough
（6）too
（7）enough to
（8）enough to

本题要求用“enough”，“too”，“enough to”和“too...to”填空，需要根据句子的意思和语法结构来选择正确的填空内容。
（1） “we check our phones in ... many places”中，需要表达我们在“太多”地方查看手机，因此填“too”。
（2） “many of us do it ... often”中，这里要表达“太频繁”，因此填“too”。
（3） “Be polite ... think about the people at your table.”中，这里表达的是“礼貌足够以至于能考虑到”，因此填“enough to”。
（4） “Don't be ... busy with your phone ... talk to them.”中，这里表达的是“不要过于忙于手机以至于不能交谈”，因此填“too”和“to”。
（5） “as long as you show ... respect for other passengers”中，这里表达的是“足够的尊重”，因此填“enough”。
（6） “don't speak ... loudly”中，这里表达的是“不要太大声”，因此填“too”。
（7） “be respectful ... avoid sharing photos of strangers”中，这里表达的是“足够尊重以至于避免分享”，因此填“enough to”。
（8） “be thoughtful ... show respect for others”中，这里表达的是“足够体贴以至于展示尊重”，因此填“enough to”。

B Read the guide about the dos and don'ts on public transport and complete it using enough, too and the correct structure with the words in brackets.
Billions of people around the world use public transport every day. With so many people getting on and off trains, buses and the underground, it's important to have good manners. Here are some dos and don'ts on public transport.
Dos
• Be (1) (patient, wait) in line. Jumping the line upsets others, and it's not fair. Stand in line, let passengers get off first, and then get on.
• Be (2) (thoughtful, give) up your seat when you see elderly, pregnant or injured passengers. Does someone look (3) (tired, stand)? Offer them your seat too!
• Clean up after yourself. Your seat should be tidy (4) for the next passenger. If everyone left rubbish behind, public transport would quickly become (5)  dirty.
Don'ts
• Don't block the doors on public transport. Leave (6)  space for people to get on and off easily.
• Don't put your backpack on an empty seat when the train, the bus or the underground is crowded. Carry your backpack on your front or hold it by your side so you leave (7)  room and won't knock into others.
• Don't eat foods with strong smells, such as durian and stinky tofu. Strong smells can bother other passengers. Many people may be (8) (polite, say) anything about it, but they don't want to smell a strong smell!

1. patient enough to wait
2. thoughtful enough to give
3. too tired to stand
4.  enough
5. too 
6. enough 
7. enough 
8. too polite to say

【分析】
首先要明确题目要求是用enough、too以及括号内单词的正确结构填空，需先掌握两个核心结构：1. “be + 形容词 + enough + to do sth.”，意为“足够……去做某事”，表达肯定含义；2. “too + 形容词 + to do sth.”，意为“太……而不能做某事”，表达否定含义。同时注意enough的位置：修饰形容词时放在形容词之后，修饰名词时放在名词之前。
接下来逐个分析语境：
1. 第一空要求表达“足够耐心地排队”，是肯定含义，用“adj + enough + to do”结构；
2. 第二空表达“足够体贴地让座”，肯定含义，用“adj + enough + to do”结构；
3. 第三空表达“太累而站不住”，是否定含义，用“too + adj + to do”结构；
4. 第四空修饰形容词tidy，表达“足够整洁”，enough放在形容词后；
5. 第五空表达“太脏”，用too修饰形容词dirty；
6. 第六空修饰名词space，表达“足够的空间”，enough放在名词前；
7. 第七空修饰名词room，表达“足够的空间”，enough放在名词前；
8. 第八空表达“太礼貌而不说”，否定含义，用“too + adj + to do”结构。
【解析】
1. 语境要求表达“足够耐心排队”，符合“be + patient + enough + to wait”结构，故填patient enough to wait；
2. 语境要求表达“足够体贴地让座”，符合“be + thoughtful + enough + to give”结构，故填thoughtful enough to give；
3. 语境要求表达“太累而站不住”，符合“too + tired + to stand”结构，故填too tired to stand；
4. 此处需要表达“足够整洁”，enough修饰形容词tidy时置于其后，故填enough；
5. 此处需要表达“太脏”，用too修饰形容词dirty，故填too；
6. 此处需要表达“足够的空间”，enough修饰名词space时置于其前，故填enough；
7. 此处需要表达“足够的空间”，enough修饰名词room（空间，不可数）时置于其前，故填enough；
8. 语境要求表达“太礼貌而不说”，符合“too + polite + to say”结构，故填too polite to say。
【答案】
1. patient enough to wait
2. thoughtful enough to give
3. too tired to stand
4. enough
5. too
6. enough
7. enough
8. too polite to say
【知识点】
enough的用法；too...to...结构；形容词搭配不定式
【点评】
本题结合公共交通礼仪的语境，考查enough和too的固定结构及enough的位置规则，既要求学生掌握核心语法结构，又需要结合语境判断语义倾向，能有效检测学生的语法运用和语境理解能力。
【难度系数】
0.6