TOEFL Review Exercise Skills 1-38

The correct answer is D because “rarely are” correctly follows subject-verb inversion used with adverbs like “rarely” at the beginning. This structure emphasizes frequency while maintaining grammatical accuracy. Other options either disrupt word order or sound unnatural. Proper inversion ensures clarity and correctness, especially in formal English, where emphasis is placed on how often sound waves consist of a single frequency.

The correct answer is D because “from either” correctly introduces multiple possible materials. It clearly shows that cameos can be made from one of several options. Other choices are incomplete or grammatically awkward. Using “either” helps express alternatives properly and maintains sentence clarity, making it suitable for listing materials in a grammatically correct and logically structured way.

The correct answer is B because “the higher the chance” correctly follows the comparative structure “the more…, the more…”. This pattern is used to show a relationship between two variables. Other options break this structure or are grammatically incorrect. This form ensures logical connection and clarity, making the sentence more effective in expressing how isolation affects the likelihood of finding wild horses.

The correct answer is C because “spent” is the correct past tense verb to describe completed actions in the past. The sentence refers to a specific time period, requiring past tense. Other options either use present tense or incorrect forms. Proper tense usage ensures clarity and accuracy, allowing the sentence to correctly describe financial behavior of families during that particular period.

The correct answer is A because “than” is used for comparisons involving differences. The phrase “not as… as” typically uses “as,” but when restructured, “than” becomes appropriate for comparing clarity levels. Other options do not fit grammatically. Using “than” ensures a correct comparison between noise-related risks and other health issues, maintaining logical and grammatical consistency.

The correct answer is A because “should take” is the correct modal verb structure expressing opinion or recommendation. Modal verbs are followed by the base form of the verb. Other options either add unnecessary pronouns or incorrect forms. This structure clearly conveys belief about government responsibility, ensuring grammatical correctness and maintaining clarity in expressing public opinion.

The correct answer is A because “The” is the correct definite article used before specific, well-known nouns like constellations. “Big Dipper” refers to a unique astronomical object. Other options are grammatically incorrect or unnecessary. Using “The” ensures clarity and correctness, helping identify the constellation as a specific and recognized entity in astronomy.

The correct answer is B because “is located” correctly uses passive voice to describe position. The sentence focuses on the academy’s location, not the action. Other options are grammatically incorrect or incomplete. Passive construction is appropriate here, ensuring clarity and proper sentence structure while accurately describing where the academy exists geographically.

The correct answer is A because “The most” correctly forms a superlative comparison. It indicates that one section stands out among all others. Other options are incomplete or grammatically incorrect. Superlatives require “the” before “most,” ensuring proper structure and clarity when identifying the highest degree of a quality within a group.

The correct answer is A because “appeared” correctly uses simple past tense for an event that happened long ago. The sentence includes a specific time reference, requiring past tense. Other options either use incorrect tense or form. Proper tense ensures clarity and historical accuracy, making the sentence logically and grammatically correct.