The scientist_______ everyone ______ our environment .
--- Is Lucy knocking at the door? --- No. It ______ be Lucy. She is in America now.
Jack, _______ eat in class. It is not polite.
--- Hey, guys. Do you often have a good time ________ after-school activities? --- Of course, we do. And we always have a lot of time ________ soccer.
You had better________ wine because you have to drive back home.
---What took you so long? ---I got lost. I have no ________ of direction.