Is necessary them to stop every two hours? A. that; for; resting B. that; of; to——青夏教育精英家教网—

摘要： Is necessary them to stop every two hours? A. that; for; resting B. that; of; to rest C. it; for; to rest D. it; of; resting

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Is_____ necessary ____them to stop ________ every two hours?

A. that; for; resting B. that; of; to rest C. it; for; to rest D. it; of; resting

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