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Large quantities of water _____ needed for cooling purposes.
Large quantities of water \_\_\_\__ needed for cooling purposes.
He has come to work for a local newspaper about ten years ago, when he graduated from Peking University.
He has come to work for a local newspaper about ten years ago, when he graduated from Peking University.
A fire _____ during the night and a large number of houses _____ to ashes.
A fire \_\_\_\__ during the night and a large number of houses \_\_\_\__ to ashes.