They [success]developed a new kind of medicine to cure the disease
问题描述：
They [success]developed a new kind of medicine to cure the disease
答
successfully adv.副词，这里修饰动词的develope
他们成功的开发了一种治疗该病的新型药物。
答
刚才看错了， 确实应该是successfully.. 我把句子看成了， they succeeded in developing a new kind of medicine to cure the disease
答
successfully 成功地
副词,用以修饰主动词developed