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11. Maryam and Lan have written to each other for over two years.
12. Marie was taken to Ben Thanh Market by Lan yesterday.
13. Kuala Lumpur is the lasgest city in Malaysia.
14. He has leaarned driven since he was eighteen.
15. There aren't any lakes in m hometown.
16. Whose hat is this?
17. Marie invited Lan to come and visit her the following summer.
18. Lan and Maryam went out to have a drink.
20. It took me two hours to do my homework.
21. Students have to study English as a second language in all secondary schools in Malaysia.

Part3/
1. Tom's test was done successfully last week.
2. This machine mustn't be used after 5.30 pm.
3. Our ao dai can be printed with lines of poetry.
4. Jeans cloth was made completely from cotton in the 18th century.
5. Hue, the world heritage of Vietnam is visited by millions of people every year.
6. The last time Tom was seen was a week ago.