题目内容
But it is ___________that publishers, to stay in business, need to bring out a large number of titles every year.
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We had decided that our last day would be spent __________one of the many activities which the hotel offered to arrange.
If you don’t read, then __________ you will forget how to read.
The overall length of gas pipeline was planned to reach 300,000 km---enough to __________ to the moon and back.
Burns can be caused when skin that isn’t used to the sun is __________ to short burst of strong sunlight.
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