Do you think important fit?A. that; keepingB. this; to keep C. it; keepD. it; to keep

问题补充：

Do you think important fit?

A. that; keeping

B. this; to keep

C. it; keep

D. it; to keep

答案：

A. that; keeping

B. this; to keep

C. it; keep

(答案→)D. it; to keep

解析：考查it作形式宾语，真正的宾语是后面的不定式。所以选D。