题目内容
Every year, we invite many doctors to give lectures on keeping fit and healthy. (改为被动语态)
Every year, many doctors ________ ________ to give lectures on keeping fit and healthy.
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题目内容
Every year, we invite many doctors to give lectures on keeping fit and healthy. (改为被动语态)
Every year, many doctors ________ ________ to give lectures on keeping fit and healthy.