I should be most happy to go down with you if I __in the way.A have not been B had not been C would not be D should not be 选着原因是?其他选则错误的理由是?

问题描述:

I should be most happy to go down with you if I __in the way.
A have not been B had not been C would not be D should not be
选着原因是?其他选则错误的理由是?