I _____________ when I was a kid. (conscientious)

1.   ?    should be more conscientious
2.   ?    should have been conscientiouser
3.   ?    should had been more conscientious
4.   ?    should have been more conscientious

I ____________ to what I ate as a kid. (pay attention)

1.   ?    should pay more attention
2.   ?    should have payed more attention
3.   ?    should had paid more attention
4.   ?    should have paid more attention

I ___________ more friends when I was in high school. (make)

1.   ?    should make
2.   ?    should have maked
3.   ?    should have made
4.   ?    shouldn't have made

I _______________ when I was a teenager. (not argue)

1.   ?    should have not argue
2.   ?    shouldn't have argued
3.   ?    shouldn't had argued
4.   ?    should have agrued

I _______________ when I started looking for my first job. (not naive)

1.   ?    should not be naive
2.   ?    shouldn't have been naive
3.   ?    shouldn't had been naive
4.   ?    shouldn't have been less naive