1. Mary has just returned from Chiangma yesterday.
2. By this time the play has probably started.
3. The price of all petroleum products has been rising steadily.
4. John worked here last year.
5. Some of the children were swimming in the pool.
6. The boy has been sitting before the television set for three hours.
7. Hundreds of people have moved to the suburbs.
8. At the head of the table sat the ambassador from sri Lanka.
9. Only rarely is the Chiangmai train on time.
10. Your daughter's attendance record has improved recently.
11. World energy demand is increasing at a rate of about 3% per year.
12. He lived in Paris during his last year.
13. on Sunday next week there will be an eclipse of the sun.