Customers are asked to make sure that they______ the right change (零钱) before leaving the shop

He didn’t make____clear when and where the meetingwould be held.

________ with teens who spend much of their free time in front of TV sets, those who are physically active often have better grades.

Good to see you again. It’s almost threeyears _______ we met last time.—Yes, how time flies.

“ Is there anything special you’d like for dinner,Teddy”— “ Nothing _____, as usual , mummy “