Chuyển các câu sau sang câu chủ động :
1. Mr. Tan may be elected the President of the company
2. The streets are swept every day by these man
3. The flights have been canceled because of the bad weather
4. The film Titanic has been shown on TV several times
5.The results of the final exam will be announced in two more weeks
6. Books of fiction are arranged on the shelf against the wall
7. She might be required to take a short test
8. This good news should be announced widely
9. Candles were used for light some centries ago
10. Paper should be used economically to save money and labor