Valentine’s Day is a day named ______ Valentine who was a priest in the third century Rome.[ ]

Bill doesn’t like playing football，but he often watches football matches (比赛)_____ TV.

You have to reorganize your article to makeit _______.

It’s always foggy these days in our city. That’s really terrible!— Yes, and I hope to plant trees. ______trees, ______ air pollution.

The professor advised us to think outside the box and to________ new, different, or unusual solutions．