Their helmets covered their faces _ that it was impossible to recognize evem one's best friends, A.to so an extent B.to as extent so C.to such an extent D.to a such extent 正确答案D
so + adj. such + a(n) + n. so + adj. + a(n) + n. such + n. (pl.) so + adj. + n. (pl.) such +n. (pl.) so + adj. + n. [不可数] such +n. [不可数]
so foolish such a fool so nice a flower such a nice flower so many/ few flowers such nice flowers so much/little money. such rapid progress so many people such a lot of people
so many 已成固定搭配,a lot of 虽相当于 many,但 a lot of 为名词性的,只能用such搭配。 so…that与such…that之间的转换既为 so与such之间的转换。
首先,这个句子的关键不是so...that和such...that的区别,而是extent这个词。extent这个词通常用于to+ some/what/such an/ a certain+ extent短语中,表示达到某种程度。在这个句子中,即为to such an extent的变体。 从另外一个角度看,so后面应该接形容词,不接名词;而such后面可接形容词,也可接名词。 如果非要在这个句子中用so...that, 就应该这么说:Their helmets covered their faces so heavily that it was impossible to recognize even one's best friends.