cheap的副詞形式是什么

　　Every voice can be heard cheaply and instantly.

　　每一個聲音都可以很容易的立馬被聽到。

　　Can it be made cheaply enough for poor countries?

　　其生產成本對貧困國家而言是否足夠低廉？

　　These firms could deal more cheaply and in greater size.

　　這些公司的進入使得交易更便宜，規模更大。