1.

a. hadn't gone

b. wouldn't have bought 

c. 3rd  

2.

a. hadn't been convinced

b. wouldn't have shown

c. 3rd

3.

a. didn't believe

b. wouldn't have put

c. mixed conditional

4.

a. wasn't

b. wouldn't be waiting

c. 2nd

5.

a. is

b. 'll see