—It smells terrible. What has happened here?—Look, there is much waste gas _____ from the chemical factory.
What isyou,young man?
Did you find __________very interesting to play yo-yo?
We were worrying about you. You shouldn’t leave us_____ telling us.
The student is _________ see the teacher because he_________a mistake.
I_________ a worker, but now I am an actor.