Question

【题目】I didn’t doubt _______ his advice was of more ______ to me.
A． that; helpful B． if; help

C． whether; helpful D． that; help

Answer 1

【答案】D

【解析】doubt当动词时,在其后面可接if或whether.在否定句及疑问句中可跟that从句，of+抽象名词=形容词，句意：对于他给我的建议是否有帮助，我并不怀疑。故选择D。