-This wall of air is an effective answer to the problem and it _work.
问题描述：
-This wall of air is an effective answer to the problem and it _work.
-Bur it is a question to put such a wall of air around the statue.
A.may B.must C.should D.could
请翻译一下意思
答
should这里是推测用法,表示：应该.work在句中是“有效果,起作用”的意思.——这道气墙是对这个问题的有效的解决方法,并且这气墙应该会起作用
——但是,如何在这雕像的周围构起这道气墙却是个问题.