The Internet is a wonderful discovery, ___of great significance to people’s lives.

Don’t tell me you’ll have a dinner date again. —______.I didn’t mean to.

______is known to us all, only the theory ______ on practice can be practical.

“It’s raining too heavily at this moment,” said the old woman, ________ out of the window.

wy days, you have to drivevery to avoid traffic accidents.