题目内容
Under the guidance of their teacher, the pupils are building a model boat ________ by steam.
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Having finished their morning work, the clerks stood up behind their desks, ________ themselves.
England’s team, who are now superbly fit, will be doing their best next week to ________ themselves for last year’s defeat.
1953 年,中共中央向全国人民正式提出了( )。
If you want to get into that tunnel, you first have to ________ away all the rocks.
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