Why do you look so worried — My MacBook Pro broke down and my paper _____unfinished ever since

I’m sorry. I at you at the other day.— Forget it. I was a bit out of control myself.

Attention, please. The plane has to be put ______ because of the heavy fog.—Oh, bad luck! We have to wait now.

ou really want to go out— It may rain , I shall go out; I don’t mind the rain

As we all know, _________ car is becoming _________ popular way of transportation in big cities.