The regulations _______ were implemented last year have significantly reduced emissions in the industrial sector.
Which choice completes the text so that it conforms to the conventions of Standard English?
that were implemented last year
, that were implemented last year,
, which were implemented last year
which were implemented last year,
Correct Answer: A
Choice A is the best answer. This question tests "that" for restrictive clauses.
- Context clues: The clause identifies WHICH regulations are being discussed—essential information.
- Meaning: Use "that" without commas for restrictive (essential) clauses.
- Verify: "The regulations that were implemented last year have..." limits which regulations.
đŸ’¡ Strategy: Use "that" without commas for essential information; use ", which" for nonessential additions.
Choice B is incorrect because "that" is for restrictive clauses and shouldn't have commas. Choice C is incorrect because "which" with only one comma is inconsistent. Choice D is incorrect because "which" should have commas on both sides or be replaced with "that."