In the sentence above, the word "houses" is being modified by the words "over there," and by the word "these." This is an error, as you must modify something that is "over there" with the word "those" rather than "these." The best way to correct the underlined portion of the sentence above is "those houses over there."

In the sentence above, the word "gym" is clearly singular; therefore, we know that all words modifiying it must also be singular. "Those" is a plural word. The best way to correct the underlined portion of the sentence above is "that."

In the sentence above, the word "industry" is being modified by the phrase "series of;" therefore we know that industry should be plural. The best way to correct the underlined portion of the sentence above is, "The series of industries."

In the sentence above, the word "hand" is being modified by the phrase "one of;" therefore, we know that hand should be plural. The best way to correct the underlined portion of the sentence above is, "on one of his hands."

In the sentence above, the phrase "powers that be" is being modified by the word "happier," however, there is no other end to the comparison. "Happier" is the wrong adjective to use in this case, as "happier" is a comparative adjective. The best way to correct the underlined portion of the sentence above is, "The powers that be are not happy."

In the sentence above, the phrase "herd of bison" is clearly singular. Therefore, we know that words modifying it should also be singular. "That" is the correct singular relative pronoun. The sentence above is correct as it is written.

In the sentence above, the word "bad" is modifying the word "performed," which is a verb. Therefore, the word "bad", which is an adjective, should be changed into an adverb. A semicolon correctly separates two independent clauses while joining them into a single sentence. "Can't" is an acceptable contraction of "cannot." The best way to correct the underlined portion of the sentence above is: "I can't believe how badly I performed on the test."

In the sentence above, the word "cow" is being modified by the words "one of;" therefore, we know that "cow" should be plural. There are two ways to make the noun "cow" plural, one is to change it to "cows" and the other is to change it to "cattle," the name for a group of cows, with the additional connotation that the cows are being used in an agricultural context. The best way to correct the underlined portion of the sentence above is: "one of his cows got out of the barn and raised a ruckus."

In the sentence above, the word "strongly" is modifying the word "boy," which is a noun. Therefore, the word "strongly", which is an adverb, should be changed into an adjective. The best way to correct the underlined portion of the sentence above is: "That boy is stronger than the other;"

Note that a semicolon is correctly used to separate two independent clauses while joining them into one compound sentence.

In the sentence above, the word "bad" is modifying the word "treats." Because "bad" is modifying a verb, it should be changed into it's adverb, "badly." The best way to correct the underlined section of the sentence above is: "she treats me so badly."