V.
1. is -> was
2. next day -> the next day
3. is -> was
4. say -> said
5. is she -> she was
6. was I -> I was
7. can't -> couldn't
8. can -> could
9. weather -> whether
10. must -> had to
VI.
1. He told me that he had something to show me then.
2. She said she was leaving there for Hue tomorrow.
3. Tom told her that he would come with her as soon as he was ready.
4. The father told us that he had to go then.
5. She asked me why I came there late.
6. Peter asked me who put the salt in his cup of coffee.
7. He asked the girl if he could play the piano.
8. Maryam said she was having a good time there.
9. Hoa asked Maryam is he liked pop music.
10. The man asked the boy where he lived.
VII,
1. had bought
2. was
3. would sell
4. had passed
5. could
6. would sell
7. had gone
8. didn't do
9. was listening
10. had to