Work hard , you will fail the exam .
Tony, it is the ________ time in ________ days that you’ve made the same mistake.
We often heard the saying: “Don't _________ till tomorrow what should be done today.” So you must finish your work today.
Mrs. Black has three children. One is in Paris, and _______are in another city.
Mr. Brown has stopped drinking since he ____ on.
—Must I tell John the bad news now? —No, you________. He can’t stand it.