Question

【题目】His writing is so confusing that it’s difficult to make out _____ he is trying to express.

A. that B. how

C. who D. what

Answer 1

【答案】D

【解析】句意：他的书写如此令人困惑，以至于难以辨认他在试图表达什么。分析句子结构可知，定语从句he is trying to express后缺少宾语，因此用what。