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
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
D
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。