问题
选择题
I never doubt ______ his advice is of great ______ to me.[ ]
A. that; valuable
B. if; value
C. whether; valuable
D. that; value
答案
答案：D
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I never doubt ______ his advice is of great ______ to me.[ ]
A. that; valuable
B. if; value
C. whether; valuable
D. that; value
答案：D