Question

请教一英语单选题~~~He grew more and more absorbed in his work, _____ he almost forgot his meals.

He grew more and more absorbed in his work, _____ he almost forgot his meals.
Athat to such an extent B to an extent such that Cto such an extent Dsuch that to an extent
答案是C 为什么选C 其他的为什么不选？ 这个句子是什么句法结构啊~~ 怎么逗号后面还能用不定式！？ 看着也不像从句啊，能帮忙分析一下句子吗？？？

Answer 1

这是两个分句，He grew more and more absorbed in his work是第一句，后一句应是to such an extent he almost forgot his meals，其中to such an extent 是固定短语，意为“到了这种程度”，是对上一句的承接，这里的to不是不定式，不定式应是“。。。to do sth”

Answer 2

B选项中such没有指代对象，such后要跟一个名词，而选项中没有跟名词，错。
A选项，that引导非限制型定于从句，指代就近的名词“work”与题目中的意思不符，题目中是指代了整个主句，应该把that改成as，A错。
D选项，such指代work并非extent，与愿意不合。
C选项是such an extent that，that省略，such指代extent省掉的that作为定于从句引导词引导从句修饰extent，对。

Answer 3

to such an extent that 为一固定句型，意为“竟然到……的地步”
而to在此并不表示不定式，是为介词，不定式后应接动词，而to such an extent that 后为名词，该句为介词短语，所以应选C