Dr. Rocío Paola Caballero-Gill is a paleoceanographer. This means that Dr. Caballero-Gill doesn’t just study oceans as they are today. She uses chemistry and fossil evidence ______blank oceans as they were in the past.
Which choice completes the text so that it conforms to the conventions of Standard English?
Correct answer: B
Explanation
Choice B is the best answer. The convention being tested is the use of verb forms within a sentence. The nonfinite to-infinitive verb “to study” is correctly used to form a subordinate clause that indicates what Dr. Caballero-Gill uses chemistry and fossil evidence for (to study oceans as they were in the past).
Choice A is incorrect because it results in an ungrammatical sentence. The finite verb “has studied” can’t be used in this way to form a subordinate clause that indicates what Dr. Caballero-Gill uses the evidence for. Choice C is incorrect because it results in an ungrammatical sentence. The finite verb “studied” can’t be used in this way to form a subordinate clause that indicates what Dr. Caballero-Gill uses the evidence for. Choice D is incorrect because it results in an ungrammatical sentence. The finite verb “studies” can’t be used in this way to form a subordinate clause that indicates what Dr. Caballero-Gill uses the evidence for.
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