III
1. It takes her half an hour to work
3. Is this your computer cheaper than that?
3. How much does this dictionary cost?
4. She doesn't have to finish the work today
5. Nam's collection's has over five hundred stamps
6. We are interesred in playing football
IV
1. How often does your brother play video?
2. Why you rarely eat out?
3. How many hours does Mninh usually send on the computer games?
4. How many books in the new public library?