问题描述：
He wrote to his mother yesterday.(将yesterday改为tomorrow)
He________ ________ ________ ________ ________his mother tomorrow.
We should take more exercise to keep health.(改为同义句)
We should________ ________to keep healthy
He________ ________ ________ ________ ________his mother tomorrow.
We should take more exercise to keep health.(改为同义句)
We should________ ________to keep healthy
问题解答：
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