23. Mr. Smiths was busy writing a story, only ______ once in a while to smoke a cigarette.
Your answer is not acceptable, and _____.
It was his nervousness in the interview _____ probably lost him the job.
It was cold outside but the door wouldn’t stay shut, so I put a chair _____ it.
The project aims to get kids to a stage called “deep reading”, _____ they can read to learn.
An exercise method _____ to improve strength and balance is becoming popular in the United States.