题目内容
You can’t be ________ careful in making the decision as it is such a critical case.
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By the first decade of the 21st century, international commercial air traffic is expected ________ vastly beyond today’s levels.
The doctor warned his patient that ________ should he return to work until he had completely recovered.
We started burning some leaves in our yard, but the fire got ________ and we had to call the fire department to put it out:
If an earthquake occurred, some of the one-storey houses ________.
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