His writing is so confusing that it is difficult to make out

问题描述:

His writing is so confusing that it is difficult to make out
it is he is trying to express.A.thatB how C who D. What这是什么从句具体的解释

d宾语从句做work out的宾语可以采纳吗那confusing that后是什么从句也是宾语吧这是复合句