____,China's large and medium-sized state enterprises need to improve their management right now.A.As it should be B.As it must be C.As it is D.As it were 选C,不选D,是不是英文时态的关系?

____,China's large and medium-sized state enterprises need to improve their management right now.A.As it should be B.As it must be C.As it is D.As it were 选C,不选D,是不是英文时态的关系?
____,China's large and medium-sized state enterprises need to improve their management right now.
A.As it should be
B.As it must be
C.As it is
D.As it were
选C,不选D,是不是英文时态的关系?

____,China's large and medium-sized state enterprises need to improve their management right now.A.As it should be B.As it must be C.As it is D.As it were 选C,不选D,是不是英文时态的关系?
因为中国的现状确实是这样,中国大中型国有企业要改进它们的管理模式.
As it is 是看样子,照这样看来的意思.As it were,可能有人说这是语法错误,但确实存在As it were,就是可以说,或某程度上的意思.
所以As it is 是最符合题意.

as it were 是虚拟语气吧