Answer:
1. The cyclist who won the race trained hard.
2. The pants that I bought yesterday are already stained.
3. The four team leaders, whoever the committee selects, will be at tomorrow’s meeting.
4. Spaghetti, which we eat at least twice a week, is one of my family’s favorite meals.
5. Where did you buy the dress that you wore last week?
6. The book, when it was finally returned, was torn and stained.
7. The store on the corner, where we usually buy all of our art supplies, burned to the ground.
Explanation:
The answer might be "us" because there might be an emphasis on the word.
In order to use more precise language, the underlined phrase entitled (7) should be changed to A: inaugural.
Then, the proper phrase would be:
Olympic marathoner Jeff Galloway won the inaugural race in 1970 when traffic was not even blocked off for the race, and runners had to run in the far right-hand lane.