Answer:
7. Ours is similar to PS Doubt Software, yet it leaves theirs far behind.
8. The dog barked loudly at them, and they quickly rushed her.
Explanation:
7.
A. These simulation - there is only one simulation so it would be This simulation
B. No error
C. it's red lights - it's is short for it is, so the sentence is saying it is red lights, which is incorrect, the correct possessive word would be its.
D. demonstrate it their at the electronic fair - their is used wrongly their means something belongs to a group of people, the proper word would have been there.
8.
A. his ham, they, them- these words aren't adjectives. adjectives describe a noun, these are just pronouns used for others.
B. The dog barked loudly at them, and they quickly rushed her. - this sentence has no errors.
C. Ducks, swans, mean - these words aren't adjectives. adjectives describe a noun, these are mostly nouns
D. our dog, those crazy - these words aren't adjectives. adjectives describe a noun, these are just pronouns.
