问题补充:
I don’t doubt his advice is well worth.
A. that, to take
B. if, to take
C. whether, taking
D. that, taking
答案:
A. that, to take
B. if, to take
C. whether, taking
(答案→)D. that, taking
解析:句意:我不怀疑他的建议很值得考虑。在否定句和疑问句中,doubt
后面接that引导的宾语从句。be worth doing sth值得做某事