a) Friday was the last time I saw Jim. Friday was the last time that I saw Jim.
b) The island we visited was extremely beautiful. The island that we visited was extremely beautiful.
c) The girl I met was a friend of Philip's. The girl whom I met was a friend of Philip's.
d) The meal we ate wasn't very tasty. The meal that we ate wasn't very tasty.
e) Gina was the first person I asked. Gina was the first person whom I asked.
f) The book I read didn't explain the problem. The book that I read didn't explain the problem.
g) The teacher we usually have was away ill. The teacher whom we usually have was away ill.
Ответ: See above.