Professor Johnson is said _____ some significant advance in his research in the past years.
The three men tried many times to sneak across the border into the neighboring country_____ by the police each time.
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_____enough time and money, the researchers would have been able to discover more in this field.
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The Clarks haven’t decided yet which hotel _____.
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_____, he can now only watch it on TV at home.
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_____ no cause for alarm, the old man went back to his room.
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In international matches, prestige is so important that the only thing that matters is to avoid _____.
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_____ time, he’ll make a first-class tennis player.
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This missile is designed so that once _____ nothing can be done to retrieve it.
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He resented _____ to wait. He expected the minister _____ him at once.
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He noticed the helicopter hovering over the field. Then to his astonishment, he saw a rope ladder _____ out and three men climbing down it.