I think your suggestions are of great to me and they are well worth .A. valuable; to offe

问题补充：

I think your suggestions are of great to me and they are well worth .

A. valuable; to offer

B. valuable; giving

C. value; taking

D. value; to follow

答案：

A. valuable; to offer

B. valuable; giving

(答案→)C. value; taking

D. value; to follow

解析：句意：我认为你的建议对我很有价值，而且他们很值得采纳。be of great value等于be very valuable意为“很有价值”；而be well worth doing意为“很值得做”；take suggestion意为“采纳建议”；故选C。