.It was ____ difficult work ____ nobody can do it well.A.so,that B.such a,that C.such,that

C. such, that
so形容词/副词that
such名词短语 that
两个的意思都是如此。。。以至于
比如说 ： he ran so fast 【副词】that nobody could not catch him 他跑得如此之快以至于没有人能追上他。
he is such a bad boy that nobody likes him.他是个如此坏的男孩以至于没有人喜欢他。
不懂的问我哦

so...that so 之后应该是直接加形容词的
such a...that work是不可数名词，所以不加不定冠词a，

so ...that 和such that 句型
so 后面接形容词
such后面接名词
意思：如此.以至于

c
such+difficult +work
work是不可数名词。所以不能用a,so修饰。