【2004.10】I have no doubt ____ he will overcome all his difficult

【2004.10】I have no doubt ____ he will overcome all his difficulties.
A、which
B、what
C、that
D、if
【正确答案】：C
【题目解析】：此题考查同位语。在fact，news，idea，thought，doubt等词之后，可用that引导出同位语从句，以具体说明这些名词的含义。