Question

英语语法改错题？

Virtually any government agency could demand that a post [must be taken down] or its author traced.
A. will be taken down
B. could be taken down
C. would be taken down
D. be taken down

我按了B为什么不对

Answer 1

正确答案选择D
考点是demand需要的意思，后面接that从句做宾语，从句谓语通常用虚拟语气
should do,should可以省略，ABC是对情态动词的考察不符合题意，本题省略
should故选D。