We were ______ after all the hard work.

We were ______ after all the hard work.
A、wear out
B、weary out
C、worn out
D、outworn
【正确答案】：C
【题目解析】：Wear out(使)疲乏，通常以过去分词的形式与系动词连用。所以，选项C是正确的。Weary后接out时，weary是动词，根据题意，应用过去式。Be outworn with sth．因什么而感到精疲力竭。