All substances, ( ), liquid or solid, are made up of atoms.
A. be they gases
B. whether they are gases
C. they are gases
D. they can be gases
答案是A,我翻了语法书大概知道了选A的原因,但是我不太懂B错在哪里?通过查资料知道有图片上这三种情况:
请问如果是按照第三种说法的话,陈述语气,B不是也可以的吗?
另外想额外问一下,A选项中是省略了should吗?是否所有whether...or...引导的让步状语从句都是有may/should这些词,但是都给省略了的?