(2013·天津模拟)His father got him a job in a bank but soon it became clear
he was not fit for that kind of work.
A. why
B. what
C. whether
D. that
网友回答
A. why
B. what
C. whether
D. that
解析：选D。考查主语从句。句意: 他爸爸在银行给他找了一份工作, 但是很快表明他不适合那种工作。分析句式it became clear. . . 可知it为形式主语, 真正的主语为后面的从句, 且从句意思完整, 故用连接词that引导。