2. came - had been - had gone
3. Have (your brother) been
4. has written
5. has never climb
6. sang
7. I have spoken
8. were
9. didn't work
10. has tidied
VI.
1. exciting
2. buildings
3. activities
4. noisiest
5. unhappy
VII
1. Did --> Have
2. weter --> wetter
3. eats --> has eaten
4. more --> most
5. hasn't --> bỏ đi
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1. most crowded city in Vietnam
2. never talked to a foreigner before.
3. seen Peter for five months.
4. It's the first time I have ever tasted fish and chips.
5. is more expensive than living in the country.
