The proposals they put at the meeting were much significance to our plan’s being carried

问题补充：

The proposals they put at the meeting were much significance to our plan’s being carried out smoothly.

A. out; of

B. up; for

C. forward; of

D. down; for

答案：

A. out; of

B. up; for

(答案→)C. forward; of

D. down; for

解析：他们在会上提出的建议对我们顺利实施这个计划有着重大的意义。put forward意思为“提出”; be of significance意思为 “有意义的；重要的”, be of +抽象名词, 相当于这个名词的形容词, 即此处相当于significant。