The Mona Lisa _______ is perhaps the world's most famous painting _______ attracts millions of visitors to the Louvre each year.
Which choice completes the text so that it conforms to the conventions of Standard English?
which is perhaps the world's most famous painting
, which is perhaps the world's most famous painting,
—which is perhaps the world's most famous painting
, which is perhaps the world's most famous painting—
Correct Answer: B
Choice B is the best answer. This question tests comma usage with nonrestrictive clauses.
- Context clues: There's only one Mona Lisa, so the clause is nonessential.
- Meaning: Nonrestrictive clauses are set off by commas on both sides.
- Verify: "The Mona Lisa, which is perhaps the world's most famous painting, attracts..." correctly adds extra information.
💡 Strategy: Unique proper nouns take ", which" clauses with commas on both sides.
Choice A is incorrect because it lacks commas. Choice C is incorrect because a single dash creates asymmetry. Choice D is incorrect because it mixes comma and dash.