Question

【题目】I had difficulties__________ the maths problem

A. working out B. work out C. to work out D. works out

Answer 1

【答案】A

【解析】

句意：我很难解出这道数学题。短语have difficulties doing sth.：做某事有困难，很难做某事；可知需用现在分词working out；故选A。