Multiple choice

Experiments__________represent a giant step into the medicine of the future

  1. using gene therapy

  2. they use

  3. use gene therapy

  4. gene therapy uses
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The main verb of the sentence is "represent". Therefore, the blank needs a modifier for the subject "Experiments", which is provided by the participle phrase "using gene therapy". Options B, C, and D introduce finite verbs that would create grammatical errors or run-on structures.

Keep practicing — related questions