Question

他们正在采取多么积极的措施来保护环境啊!

_____________________________________ now !

Answer

What active action they are taking to protect the environment

【解析】

根据汉语和英语提示可知，此处缺少“他们……采取多么积极的措施来保护环境啊”，根据汉语可知句子为感叹句，感叹的部分是“措施”，所以用what来引导，因置于句首，首字母需大写，所以是What；英语中“积极的措施”是active action；根据“他们正在采取”可知时态为现在进行时，所以是they are taking；根据汉语提示“来保护环境”可知用动词不定式来表达目的，英语表达为to protect the environment，故填What active action they are taking to protect the environment.