1a) Is Bill or Ted responsible for this mess? (Incorrect subject-verb agreement, should be "Are Bill or Ted responsible for this mess?")
1b) Are Bill or Ted responsible for this mess? (Correct subject-verb agreement)
2a) In the forest grows one hundred year old trees. (Incorrect subject-verb agreement, should be "In the forest grow one hundred year old trees.")
2b) In the forest grow one hundred year old trees. (Correct subject-verb agreement)
3a) Children of a certain age sleeps a lot. (Incorrect subject-verb agreement, should be "Children of a certain age sleep a lot.")
3b) Children of a certain age sleep a lot. (Correct subject-verb agreement)
4a) Running with no shoes is a good way to get dirty feet. (Correct subject-verb agreement)
4b) Running with no shoes are a good way to get dirty feet. (Incorrect subject-verb agreement, should be "Running with no shoes is a good way to get dirty feet.")
5a) The kids in the dorm make a lot of noise. (Correct subject-verb agreement)
5b) The kids in the dorm makes a lot of noise. (Incorrect subject-verb agreement, should be "The kids in the dorm make a lot of noise.")
6a) Why do they like turnips? (Correct subject-verb agreement)
6b) Why does they like turnips? (Incorrect subject-verb agreement, should be "Why do they like turnips?")
7a) Listening to the instructions require patience. (Incorrect subject-verb agreement, should be "Listening to the instructions requires patience.")
7b) Listening to the instructions requires patience. (Correct subject-verb agreement)
8a) A person who speak more than one language is interesting! (Incorrect subject-verb agreement, should be "A person who speaks more than one language is interesting!")
8b) A person who speaks more than one language is interesting! (Correct subject-verb agreement)