单选题
[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
答案解析：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。