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高一英语(Unit 1):同义句转换:Scientists have made great progress in the research on同义句转换:Scientists have made great progress in the research on the medicine but there is still a long way to go.The medicine ____ ____ greatly ____ b

题目详情
高一英语(Unit 1):同义句转换:Scientists have made great progress in the research on
同义句转换:Scientists have made great progress in the research on the medicine but there is still a long way to go.
The medicine ____ ____ greatly ____ by scientists but there is still a long way to go.
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答案和解析
The medicine _has_ _been_ greatly _improved_ by scientists but there is still a long way to go.