题目

He promised to do what he ______ sure of _______. A. could make; my happy B. could to make; me happy C. could make; my happiness D. could to make; my happiness 答案：D 解析: 本题句意“他许诺做他能做的保证使我幸福”。what he could (do)to make sure of my happiness，其中to make sure of my happiness做状语。

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