1. Nam went out with his friends last night

-> I saw...........................................................

2. We turned of all the lights and then we went out

-> After we..................................................................

3. I want my son to learn a kind of musical instrument

-> I want a kind of musical instrument.................

4. It's waste of time to try to explain anything to Tony ( worth )

->....................................................................................

5. He couldn't play well in the last match because of his injured knee

-> His injured knee made..............................................................

6. I haven't met my uncle for 5 years

-> The last time...............................................