The word "it" in this sentence is ambiguous. In this situation, it is possible for the "it" to refer either to the car or the part installed. Take, for example, that he installed a new radio or speakers in his car. It is entirely possible that the car would be able to work when these components are not working and vice versa. Perhaps while installing the radio/speakers, this person accidentally cut a wire that was vital to some other electrical components of the car. It is possible that the car may not start fully (i.e. to be able to drive), but perhaps the radio might still turn on - at least for a bit. So, it is important to clarify this; the best choice is, "the part did not work properly" since it is the only choice that is not vague.

This sentence contains an ambiguous pronoun. The word "it" could easily refer to the dog or the park in English. The choice that fixes this issue is, "his dog to the park, which was very big" because English grammar dictates that a relative pronoun (which) come directly after the word it modifies.

"Who" is not appropriate because this pronoun is only reserved for humans in English, and "that" is inappropriate because the semicolon before it dictates that both clauses must be independent (any phrase that follows "that" is dependent).

This sentence uses the pronoun "he," which is very ambiguous in this sentence. Does "he" refer to William or Toby? Changing the "he" to "who" fixes this issue because English grammar dictates that a relative pronoun appear after the word to which it is referring. "That" makes sense because William and Toby are humans (that is reserved for objects) and the other choices do not make any substantial changes to the original sentence. The answer is, "who was a very sociable individual."

This sentence contains many errors: foremost, it is very ambiguous in the usage of the pronoun in its current form. It is unclear whether the sentence means that the charts are loved or Trina's song. Additionally, passive voice is used in this sentence when active voice is better for a relatively complex sentence like this one (i.e. The subject must do the action of the sentence) in standard English. The correct choice is, "Trina's new song, which many people love, topped the charts."

The sentence contains an ambiguous pronoun. Technically, the word "which" could apply to both "the tree" and "the park" in this sentence. The word order needs to be reorganized in such a way that it is clear which words specifically refer to which nouns. The correct choice is, "The beautiful park's largest tree is as old as the city" as all of the other sentences contain some degree of ambiguity. This choice is the only one that is specific and clear.

Eliminate the choices containing ambiguous pronouns, as it is not clear to whom "their," "one," and "they" refers. Note that the correct answer adds the necessary auxiliary verb "do". The use of the noun in "how children's..." resolves any issues with ambiguity.

Eliminate the choices containing ambiguous pronouns, as it is not clear to whom "their," "one," and "they" refers. Note that the correct answer adds the necessary auxiliary verb "do". The use of the noun in "how infant's..." resolves any issues with ambiguity.

The use of "they" in the underlined portion of the sentence is ambiguous and confusing, as it is unclear whether "they" refers to the "bettors" or the "team." The best way to clear up this confusion is to not use the pronoun at all, but rather to replace it with the actual noun it replaces. The only answer choice which properly clears up this confusion is "as the team had only a spotty track record of success."

The use of "I" at the end of this sentence is incorrect, as it is a subjective pronoun used as the object of the preposition "to." Pronouns used as objects of prepositions need to be in their objective, not their subjective forms. As it is used in the sentence, "him" is correct, since it is also an object of "to," but it is an objective pronoun. "I," on the other hand, needs to be changed to its objective form, "me." The correct answer choice is the only one that makes this change, "until the committee talks to both him and me."

The use of "it's" as it is used in this is incorrect. "It's" is the contraction of "it is," and not as the possessive form of "it"; the possessive form of "it" is "its." Only one choice uses the correct form, "ever ran properly was in it’s original demonstration," making it the correct answer.