I never doubt ________ his advice is of great _________ to me. A. that; helpful B. if; help C. wheth...
2023-01-09 06:16:07 217次 2014-2015学年江苏泰兴洋思中学九年级上第一次月考英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
I never doubt ________ his advice is of great _________ to me.
A. that; helpful B. if; help
C. whether; helpful D. that; help
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