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

"You can't tell a book by it's cover" is an old adage.

In this sentence, "fast" is used to modify the verb "moved," indicating the manner in which the cars were moving. As an adverb, "fast" describes the speed or manner of the action. In this case, it describes how the cars were moving quickly on the overpass.

were raised

"As we celebrated the start of the evening's festivities, our glasses were raised and a toast was made by our host."

The verb "raise" is the correct choice in this context to indicate the action of lifting the glasses in celebration. The past tense of "raise" is "raised," so the correct form is "were raised" to match the subject "our glasses."

The correct sentence would be: "During the fight, I was hit on the head."

In this context, "the head" refers to a specific body part, indicating where the person was hit. The definite article "the" is used before "head" to specify which head is being referred to. The other options (A, B, and D) either use an incorrect article or lack an article, making them grammatically incorrect in this sentence.

Easiest.
The correct word to use in this context is "easiest" because it is the superlative form of the adjective "easy." When comparing multiple items or actions, the superlative form is used to indicate the highest degree of the quality being described. In this case, "the easiest" indicates that the test was the most easy out of all the tests in the course. Therefore, option D is the correct choice.