高二英语选择：We could have asked someone to carryWe could have asked someone to carry out the plan privatelywithout it _____.A was known B.knows C.being known D.be known请详细说说.
问题描述：
高二英语选择：We could have asked someone to carry
We could have asked someone to carry out the plan privatelywithout it _____.
A was known B.knows C.being known D.be known
请详细说说.
答