1.People can't live without music.
2. To play musical instrument is a great pleasure.
3. My sister enjoys playing the piano.
4. If a person wants to play the guitar well, he has to practise it regularly.
5. The happiness is usually the product of the honesty and hard work.
6. The flood did a lot of greatest problems facing mankind.
7. Don't eat in this restaurant. the food is awful there.