Question I. Rewrite the following sentences with the words given: 
1. My father started to work in this factory last week
Ò My father has…………………………………………
2. He started living in Ho Chi Minh city when he was 8
Ò He has …………………………………………………………………………
3. He learnt English when he was 18
Ò He has ………………………………………………………………………………
4. They have worked in that factory for five years.
Ò They began ……………………………………………………………..
5. We have learnt English for four years.
Ò We started...........................................................................................................
6. I saw her 10 years ago.
Ò I haven't...............................................................................................................
7. They started checking the machines two hours ago 
-->They have ……………………………………………………………………………
8. They started building the bridge two years ago
--> They have……………………………………………………………………………..
9. Nam started learning English in 1998
--> Nam has…………………………………………………………………………….
10. Khanh started playing computer games in 2002 
--> Khanh has……………………………………………………………………………..