The answers are as follow:
5. is B
6. is B
7. is D
Question 2: We might use flying cars one day
Question 3: My family and I probably won’t go to Florida next year
Question 4: people might live in space one day
Question 5: We won’t be able to travel next year. We can’t afford it
A plural noun indicates that there is more than one of that noun (while a singular noun indicates that there is just one of the noun). ... Regular plurals follow this rule (and other similar rules), but irregular plurals are, well, not regular and don't follow a “standard” rule.
Answer: The train is headed to the North Pole
Explanation:
