It is no use _________ to persuade him ________ smoking because he has been addicted to it since he wasyoung.
It was last night ________ I saw the comet.
—Did Linda see the traffic accident?—No,no sooner ________ than it happened.
—Have you got any particular plans for the coming holiday?—Yes.________,I'm going to visit some homes for the old in the city.
—Who should be responsible for the accident?—The boss,not the workers.They just carried out the order ________.
The shocking news made me realize ________ terrible problems we would face.