. He made a promisehe would achieve the success that his parents were looking forward to.A

问题补充：

. He made a promisehe would achieve the success that his parents were looking forward to.

A. what

B. when

C. that

D. which

答案：

A. what

B. when

(答案→)C. that

D. which

解析：考查同位语从句，同位词是a promise，that引导同位语从句，对promise的内容进行说明，只起到连接的作用，不做成分，句意是：他许下诺言他会取得父母一直希望的成功的。选C。