Correct Answer: C

Rationale: Option C, 'enabled him to quickly rise,' is the correct choice. The sentence is referring to a past action, so the verb should be in the past tense. 'Enabled' is the correct past tense form of 'enable' in this context. Choice A ('NO CHANGE') is incorrect because it does not match the past tense required by the sentence. Option B ('are enabling him to quickly rise') is incorrect as it uses the present continuous tense, which is not suitable for the past action described. Choice D ('will enable him to quickly rise') is incorrect as it implies a future action, which is not consistent with the context of the sentence.

Correct Answer: D

Rationale: The correct answer is 'D: Rare.' In the sentence, it is mentioned that 'a hundred years ago, automobiles were rare,' which provides the context that the opposite of rare would mean something very common, thus helping to decipher the meaning of 'ubiquitous.' Choice A, 'Ago,' refers to a time frame and doesn't directly provide a contrast to 'ubiquitous.' Choice B, 'Cars,' is mentioned in both parts of the sentence and does not help in defining 'ubiquitous.' Choice C, 'Now,' signifies the current time but doesn't contrast with 'ubiquitous' to aid in its understanding.

Correct Answer: D

Rationale: The correct answer is D. The sentence should be corrected by removing the period and joining the clauses to avoid a sentence fragment. Option A is incorrect because it incorrectly separates the clauses with a comma. Option B is incorrect as it incorrectly uses a comma after 'Protesters' and lacks proper structure. Option C is incorrect as it places the subordinate clause at the beginning, which disrupts the flow of the sentence.

Correct Answer: D

Rationale: The correct answer is 'Anaesthetic'. 'Anaesthetic' refers to a drug that removes feeling or sensation. The prefix 'ana-' means without, and the root 'esthetic' relates to sensation or feeling. 'Hyperalgesia' refers to increased sensitivity to pain, 'Subcranial' does not relate to drugs or removing sensation, and 'Hypoglycemic' refers to low blood sugar levels, not a drug that removes feeling or sensation.

Correct Answer: D

Rationale: The sentence provided is classified as compound-complex. It contains two independent clauses ('Although I wished it were summer' and 'I accepted the change of seasons') and one dependent clause ('and I started to appreciate the fall'). A compound sentence joins two independent clauses with a coordinating conjunction, a complex sentence consists of an independent clause and at least one dependent clause, while a compound-complex sentence combines elements of both by having multiple independent clauses and at least one dependent clause. Therefore, choices A, B, and C are incorrect as they do not accurately describe the structure of the sentence.