Identify the best way to improve the underlined part of the given sentence. She is a very good sprinter. I can't run as fast as s…

Question

Identify the best way to improve the underlined part of the given sentence.

She is a very good sprinter. I can't run as fast as she does.

1. A. as she do
2. B. as she doing
3. C. like she is doing
4. D. no improvement (Correct answer)

Correct Answer

Option D — no improvement

Detailed Solution & Explanation

The correct answer is no improvement.

Key Points

• The underlined part, "as fast as she does", is already grammatically correct and needs no change.
• The structure for comparing two things of equal degree is as + adjective/adverb + as, and here *fast* is an adverb modifying *run*, so as fast as is right.
• The clause is completed by the auxiliary "does", standing in for *runs* — a standard and correct substitution in English comparisons.
• Each alternative introduces an error:
  • "as she do" — subject-verb disagreement; *she* takes *does*, never *do*.
  • "as she doing" — a bare *-ing* form cannot follow the subject without an auxiliary.
  • "like she is doing" — *like* is a preposition and should not introduce a full clause in formal usage; *as* is required.

Additional Information

• Remember the distinction: like is followed by a noun or pronoun (*She runs like a deer*), while as is followed by a clause containing a verb (*She runs as her sister does*).
• In sentence-improvement questions, always read the original carefully first — a meaningful share of these items are already correct, and "no improvement" is a genuine answer rather than a filler option.