Select the word in the sentence that is not used correctly.

They're going to the mall to pick up there uniforms for their coach.

The correct form to use in this context is "its cover" without the apostrophe.

Therefore, the corrected sentence would be: "You can't tell a book by its cover" is an old adage.

The possessive pronoun "its" is used to indicate that the cover belongs to the book. It does not require an apostrophe in this case.

The options A. "a book," C. "can't," and D. "an old" are used correctly in the sentence. It is only the incorrect use of "it's cover" that makes the sentence grammatically incorrect.

"The men and women of the graduating class threw their caps into the air."

In this sentence, "threw" is the past tense of the verb "throw" and matches the subject "The men and women of the graduating class" in terms of verb agreement. It indicates that the action of throwing the caps into the air was performed by the graduating class.

The other options do not fit the context:

A. "Thorough" is an adjective that means complete or careful. It does not fit the action of throwing caps.

C. "Throwing" is a present participle form of the verb "throw" and does not match the tense needed in the sentence.

D. "Through" is a preposition that indicates movement or passage, but it does not fit the action of throwing caps.

Therefore, the correct word to make the sentence grammatically correct is B. "Threw."

The correct possessive form of "her" does not require an apostrophe. The correct form is simply "hers." Therefore, the word "her's" with an apostrophe is incorrect. The sentence should be written as: "The student did not recognize which backpack was hers." Option A is the word that is not correct in the given sentence.

He felt bad about the broken window.

The word "badly" is an adverb that describes how an action is performed. In sentence A, "He felt badly about being late," the adverb "badly" is used to describe the verb "felt," indicating that he felt in a poor or inadequate manner. However, it would be more appropriate to use the adjective "bad" to describe the feeling itself, as in sentence C, "He felt bad about the broken window."

Sentence B, "He did bad on the test," is incorrect because the adjective "bad" should be used instead of the adverb "badly" to describe how he performed on the test. Therefore, it should be "He did badly on the test."

Sentence D, "When the patient feels badly, give him an aspirin," is also incorrect because, in this case, the adverb "badly" is used to describe how the patient feels, which is grammatically incorrect. Instead, the adjective "bad" should be used to describe the patient's condition, as in "When the patient feels bad, give him an aspirin."