Supply the correct form of the verb in the brackets

[Wallflowergirl]

Dear teacher,
Please help me to correct this exercise.
Thank you very much!
W.F.G

Supply the correct form of the verb in the brackets
1. Bill asked me to come over to his apartment, but I didn’t want to leave the house because I was waiting for a phone call.
2. Amy didn’t hear her parent having an argument last night. She was in her room listening to music.
3. Everyone makes mistakes in the life. I have made lots of mistakes in the life. The important think is to learn from one’s mistakes. Right?
4. Maintaining this old car for the past five years has cost us much less than we would have spent if we have bought a new one. We have saved a lot of money by not buying a new car.
5. How much longer until we arrive at the Singapore airport? Let me see. It’s about 9:15. We have been flying for almost six hours. We should be there in another couple of hours.
6. Is the rescue crew still looking for survivors of the plane crash? Yes, they have been searching the area for hours, but they haven’t found anybody yet. They’ll keep searching until night falls.

[Mister Micawber]

3-- in life / in their lives / in my life. the important thing.
4-- if we had bought

The rest are OK.
_________________
Native English teacher at Mister Micawber's

[Wallflowergirl]

Thank you so much! I will correct my mistakes!
W.F.G