1, In spite of being a millionalre, he hates spending money.

2, The man who was very helpful spoke to me.

3, The book has just been bought this afternoon.

4. Minh isn't on the phone which makes it difficult to contact him.

IV: 1, travelled

2, will go

3, did

4, has already left

VI: 1, In spite of being a milionaire, Henry hates spending money

2, The man, who spoke to me, was very helpful

3, The book has just been bought this afternoon

4, Minh isn't on the phone so this makes it difficult to contact him