If the firefighters ________ in time, the fire would have resulted in many deaths in the hotel.
Many people in the west make ________ a rule to buy Christmas presents for their relatives and friends.
Has ________ been decided when we are to hold the sports meeting?
—Who knocked at the door?—I’ve no idea. I just pretended nobody was at home, so I didn’t ask who ________ was.
The doctor kept telling him that he mustn’t smoke, but ________ didn’t help.
Don’t leave your keys in the car. Someone might steal ________ 。