Here are the correct answers for each sentence:

1. I wish I **had** enough money to travel around the world. (a)
2. She was reading a book when a loud noise **interrupted** her concentration. (c)
3. The team **was preparing** for the presentation when the teacher walked into the classroom. (a)
4. At this time yesterday, our family **was looking** through old photo albums together. (d)
5. Patrick was tidying the attic when he **found** his secondary school yearbook. (a)
6. These economy plane seats are really uncomfortable. I wish we **could travel** first class. (c)
7. We wish we **could take** more photos during our trip to Japan. (c)
8. Last week, the students **visited** an exhibition that displayed ancient Egyptian artifacts. (b)
9. Peter wishes his brother **won't forget** to turn off the stove before leaving the house. (b)
10. My mother **was** at the supermarket when she **saw** an old classmate of hers. (Note: "was" fills in the blank for "was at the supermarket," but "saw" should be used for the second blank.)

Let me know if you need anything else!