The topic _______ the researchers focused was climate change adaptation.
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readingWhich choice completes the text so that it conforms to the conventions of Standard English?
A
that
B
on which
C
in that
D
which on
Correct Answer: B
Choice B is the best answer. This question tests relative pronoun with preposition.
- Context clues: "Focus" is typically followed by "on" (focus on something).
- Meaning: In formal writing, the preposition often comes before the relative pronoun.
- Verify: "The topic on which the researchers focused" is grammatically correct.
💡 Strategy: In formal writing, prepositions often precede relative pronouns (on which, for whom).
Choice A is incorrect because "focus" requires the preposition "on." Choice C is incorrect because "in that" doesn't collocate with "focus." Choice D is incorrect because "which on" has incorrect word order.