We should be grateful if you would say _______ they are likely _______ a credit up to US $10,
A、what, to be reliable for
B、if,to be reliable at
C、whether, to be reliable for
D、that,to be reliable of
【正确答案】：C
【题目解析】：作discuss，say等动词的宾语时，用whether不用if。likely to do sth可能做某事。
