1 . Huguosi Street was one of Beijing’s _________ (busy) commercial roads in the olden days. (所给词的适当形式填空)
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2 . Tomorrow is often the _______ (busy) day of the week. (用所给词的适当形式填空)
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3 . They are busying____________ (they)in tidying up the table. (所给词的适当形式填空)
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4 . With the final examinations approaching, Jane busies herself ___________ (review) her lessons. (所给词的适当形式填空)
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