1. Nam is very young. He can’t drive a car.
=> Nam is……not old enough to drive a car…
2. Does your country export rice to the USA ?
=> Is rice…exported to the USA by your country?……
3. My father often smoked 20 cigarettes a day but now he doesn’t smoke anymore.
=> My father used…to smoke 20 cigarettes a day…
=> Lan asked if I could give her the pen
5. They last visited me 5 years ago.
=> They haven’t……visited me for 5 years…
6. They have studied computer for two years.
=> They started…studying computer two years ago
7. Was the steam engine invented by James Watt?
=> Did James Watt…invent the steam engine?
8. “ Do you like this chocolate factory?” the foreman asked.
=> The foreman asked if I …liked that chocolate factory…
9. They have to take the tourists to the hotel before noon.
=> The tourists have to be taken to the hotel before noon
10. She is too weak to carry this box.
=> sHe isn’t strong enough to carry this box