______ on time, or you’ll be fired.
Young students are ______ not to smoke both in and out school.
He commanded that all the gates _____when it was getting dark in case thieves came in .
.Mr. Black has been teaching English in a middle school _____ he came to China.
I know you are very ____ice-cream, but you will gain weight if you eat too much.
I don’t think she is a nice woman; I am _____ her empty talk.