Question

【题目】_______ the difficult maths problem, she felt relieved.

A. Worked out B. To work out C. Having worked out D. Work out

Answer 1

【答案】C

【解析】

考查分词做状语。句意：算出这道很难的数学题以后，她感觉很放松。动词短语work out与主语she构成主动关系，而且该动作在她感觉放松正确，所以用现在分词的完成式having done。故C项正确。