It was playing video games that took the boy too much time that he have spent learning.
The computer system ____ suddenly while he was searching for information on the Internet.
Many students joined in the ____ race in the sports meeting to be held next week.
___ and out of breath, we reached the top of the mountain and stopped ____ the beautiful scenery.
I think you need some outdoor exercise. Plenty of fresh air will ___ good health.
I have read the material several times but it doesn’t make any ____ to me.