The math problem was easy for me work out. [ ]

As more and more restaurants join “clear your plate” campaign, people are encouraged _______ food any more.

He got a letter from his father _____ Monday morning. [ ]

A: Is that your watch_____ the lost and found case? Please call me_____ 685-6034.B: Oh, thank you.[ ]

Wendy, don’t waste the food! all the vegetables on the plate.