1. He didn't make any m______ in today's English exam.
2. Could you p______ me with information about student exchange programs?
3. Many visitors enjoy spending a few hours walking t______ the history museum.
4. The boy is old enough to d______ himself.
5. The signs says that you can't p______ your car here.
6. Be careful! Put the secret letter in a s______ place.
7. It's more c______ to take a taxi to the station than take a bus, but too expensive.
8. You can buy f______ fruit and vegetables in the supermarket.
9. —What are some of the d______ of the web?
    —You may waste your time playing games. Sometimes you may be cheated (受骗) online, etc.
10. You can take the e______ to the second floor and turn right. You can find it there.