VI
1. The man whose son plays with us every day is an architect.
2. I wish Mary were here now.
3. If I knew his address, I could write to him.
4. I wish I remembered her surname.
5. This popular TV program is watched by millions of people every week.
6. I suggest putting garbage bins around the schoolyard.
7. The boy said that they had to try their best to win thw match.
8. Why don't we cut the branches of the trees.
9. Hoa can't dance as well as Lan.
10. They must finish this work on time.

II
1. developments
2. Education
3. friendship
4. careful
5. collector
6. activities
III
1. because --> because of
2. heavy --> heavily
3. doing --> to do
4. happy --> happily