Question

You'd better read the instructions _____________(仔细地) first before you eat the medicine.

Answer

carefully

【解析】

句意：你最好在吃药前先仔细阅读说明书。

根据句意理解及中文提示可知，英语中“仔细地”是carefully，是一个副词，在句中修饰的是动词read，所以直接用副词本身，故答案为carefully。