If he <u>were</u> in better shape, he would be a great addition to the team.
Answer: D. Were
Reasoning:
If he <u>are</u> in better shape, he would be a great addition to the team.
Makes no sense.
If he <u>be</u> in better shape, he would be a great addition to the team.
makes no sense.
If he <u>is</u> in better shape, he would be a great addition to the team.
makes no sense.
If he <u>were</u> in better shape, he would be a great addition to the team.
Makes sense!