Digital PSAT Reading and Writing Practice Question 280: Answer and Explanation
Question: 280
The innate immune system ___________ of two major barriers: the skin and the natural flora (i.e., naturally occurring bacteria).
Which choice completes the text so that it conforms to the conventions of Standard English?
- A. consist
- B. consists
- C. consisting
- D. to consist
Correct Answer: B
Explanation:
B. The subject is “system,” a singular subject requiring a singular verb of “consists.” Eliminate Choice A for using a plural verb. Eliminate Choice C, which uses a gerund, ultimately leading to a sentence fragment. Choice D uses an infinitive verb, and conjugation is required for a full sentence.
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