Which of the following italicized parts is a subject clause(主语从句)?(2011)

A、 It is sheer luck that the miners are still alive after ten days.
B、 He has to face the fact that there will be no pay rise this year.
C、 She said that she had seen the man earlier that morning.
D、 We are quite certain that we will get there in time.

【正确答案】 A

【答案解析】解析：2011年第60题。B项中名词the fact后的that从句内容完整，与先行名词内容同指，为同位语从句；C项及物动词said之后的that从句，为宾语从句；D项中形容词certain之后的that从句，为补语从句。只有A项中that从句为形式主语it的具体所指，为真正的主语，是正确答案。