选:a.such a fool as to (注:多了一个to;原句中已经是to think了,那么每个选项的最后一词to就应去掉;或者保留选项中的to,而去掉题干中的to.)
解析:因为fool是可数名词单数,因此同such搭配,所以就选a,不能选d.
"如此...以至于做某事"的几种表达形式:
so/such...that...
such/so...as to do sth.
区别:so后加形容词/副词; such后加名词;
that后跟句子; as to后跟动词原形.
根本没有as...as to do sth.表示"如此...以至于做某事"这种说法.
I am such a fool as to think that she is a warm hearted woman.
=I am so foolish to think that she is a warm hearted woman.
句意:我真傻,竟然认为她是个热心肠的女人.