Question

【题目】As is known, only hard leads to happiness.

A. work B. works

C. worked D. working

Answer 1

【答案】D

【解析】考查非谓语。句意：众所周知，只有努力才能获得幸福。分析句子可知，本空在句子中做主语，故要用动名词形式，故选D项。