a. If only we hadn’t spent so much money on this car.
b. The police has(or have) looked/has(or have) been looking for the child since last night.
c. The new catalogue has been sent to our customers.
d. I’m getting/I’m going to get my hair cut tomorrow.
e. Are several new lifeguards being trained at our pool?
f. If I knew how to ski, I would/could go with you on your skiing holiday.
g. My father warned me not to turn up the music.
1. was working
2.was completely buried
4.will be used up
9.would have died
10.weren’t /wouldn’t be (if we understand it as a future wish)