当然是绝对不行的!
to是介词,后面不能直接接动词原形,介词to后接ing形式,而且the key to doing sth是一个常用词组,记忆则可.回答完毕.
PS：楼上的,the question是名词啊,不是动词,连词性都没搞清楚就不要来误人子弟!
the key to solving the problem is to meeet the demand made b
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