1. It was a long hot summer.
2. It's fourteen years since I saw him. 3. It costs me only 200 baht.
4. It is easier to talk about a problem than it is to solve it.
5. How long is it since you had a raise in salary?
6. It is unlikely that the results of the elections will be made public before tomorrow morning.
7. It would have been a perfect paper except for one misspelled word.
8. It has been raining every day. The rivers have overflowed their banks.
9. It is a well-known fact that deforestation will cause soil erosion and flooding.
10. It is extremely important for an engineer to know how to use a computer.