It is beyond my understanding that many adults be so crazy about Harry Potter series.A. w

问题补充：

It is beyond my understanding that many adults be so crazy about Harry Potter series.

A. will

B. can

C. may

D. should

答案：

A. will

B. can

C. may

D. should

解析：D

解析考查情态动词。句意为：很多成年人居然对哈利·波特系列这么上瘾，对此我不能理解。这里用should表示“居然，竟然”。其他选项都没有这个含义。