问题
选择题
His father got him a jib in a bank but soon it became clear ______ he was not fit for that kind of work .
A．that
B．why
C．what
D．whether
答案
答案：A
题目分析：考查that引导的主语从句，句意：他爸爸给他在银行找了一份工作，但很快就很明显他不适合这种工作。It是形式主语，that引导的真正的主语从句，主语从句不缺成分，that只起到连接作用，没有含义。选A。
点评：如果名词性从句不缺成分，一般用that引导。what引导名词性从句时，要在主语从句中做主语，宾语和表语，