I believe it's foot, i'm new please don't hurt me. Hope it helped.
An antonym for precursor is successor .
An antonym for interjection is long discourse .
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Answer:
1. Chris ate spaghetti every day last week.
2. When I came into the room, two boys were playing football.
3. Peter turned on the TV, but nothing happened.
4. While we ran in the park, Mary fell over
5. While I listened to music, I heard the doorbell.
6. I broke my pen while I was doing my homework.
Explanation: