完形填空。 Going Abroad for Sightseeing Do you like to go abroad for sightseeing (观光)? It is interesting to visit 1 countries, but there are some 2 when we don't know the language 3 . It may be difficult 4 with the people there. We may 5 how to use the 6 telephone. It is not easy to decide 7 to tip (给小费) waiters or taxi drivers, and when we need help, we don't know how to 8 help. After a while, however, we learn 9 to do and what to say, and we learn to enjoy life in the country, and then we may 10 to leave. (     )1. A. other (     )2. A. questions (     )3. A. very good (     )4. A. to talk (     )5. A. not to know (     )6. A. small (     )7. A. how (     )8. A. search for (     )9. A. what (     )10. A. be worried B. the other B. problems B. wonderful B. talk B. not know B. big B. how many B. look for B. how B. feel pleasant C. another C. trouble C. very well C. speaking C. know not C. modern C. how much C. ask for C. which C. feel sorry