Going to America for further study is a good chance I have been looking forward to . A.

问题补充：

Going to America for further study is a good chance , I have been looking forward to .

A. it

B. that

C. one

D. the one

答案：

A. it

B. that

(答案→)C. one

D. the one

解析：考查代词：A. it 特指同类同物B. that特指前面的可数名词单数或不可数名词，C. one泛指前面的可数名词单数，D. the one 特指前面的可数名词单数，句意：去美国深造是个好机会，是我一直渴望的机会。One代指a chance。选C。