1 . It all depends on the weather ________ (clear) up. (所给词的适当形式填空)
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2 . The safety officer requested that the beach ________ (clear) of people before huge waves crashed into the coast. (所给词的适当形式填空)
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3 . Together, those volunteers and the NECC students worked ________ (clear) rubbish out of a three-story building.(所给词的适当形式填空)
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