完形填空。 Have you heard of the term 'etiquette' and do you know that etiquette is not only a useful word __ 1 __ very useful to understand? Etiquette is not the same in every culture __ 2 __ in every situation. For example, standing very close to the person you are talking with is quite common in some Asian countries. However, if you do this in Europe, some __ 3 __ people might feel __ 4 __. Even in China, we all know that etiquette is not the same in all situations. Perhaps we think that talking loudly in our own homes is fine, but there are other places where talking loudly is __ 5 __. For example, most people would agree that talking loudly in a library, a museum, or a movie theater is __ 6 __. Even if you are with your friends, it is better to keep your voice __ 7 __in public places. In fact, we should also __ 8 __ not to cough or sneeze loudly in public. If we see someone __ 9 __ the rules of etiquette, we may politely give them some suggestions. Perhaps one of the most polite ways _ 10 __ ask someone, Would you mind doing this or would you mind not doing that. For example, if someone cuts _ 11 __ you in a line, you could ask them, Sorry, would you mind _ 12 __ the line? If someone is smoking on the busm, you could ask, Excuse me, could you please _ 13 __ that cigarette? People don't usually like _ 14 __ , so we have to becareful how we do this. Although rules of etiquette can often be different, some rules are the same almost everywhere in the world! For example, _ 15 __ is almost never allowed. If you see someone you know doing this, you can ask them, Would you mind picking it up? (     )1. A. however (     )2. A. or (     )3. A. Asian (     )4. A. comfortable (     )5. A. not allow (     )6. A. polite (     )7. A. off (     )8. A. try (     )9. A. following (     )10. A. are (     )11. A. in front (     )12. A. waiting (     )13. A. put on (     )14. A. be criticized (     )15. A. dropping litter B. although B. but B. American B. uncomfortable B. not asked B. rude B. Small B. make it B. breaking B. are to B. in front of B. jumping B. put off B. to criticize B. chopping trees C. nor C. as C. European C. happy C. not allowed C. impossible C. loud C. take care of C. obeying C. is C. in the front C. cutting C. put out C. to be criticized C. smoking D. but also D. and D. African D. excited D. allowed D. Common D. down D. care for D. broken D. is to D. in the front of D. joining D. put up D. criticized D. picking