he is tired he doesn’t stop working.A. Though ; / B. But; thoughC. though; butD. / ;/

问题补充：

he is tired ,he doesn’t stop working.

A. Though ; /

B. But; though

C. though; but

D. / ;/

答案：

(答案→)A. Though ; /

B. But; though

C. though; but

D. / ;/

解析：though虽然，尽管；but但是。这两个单词按照汉语思维来看，是一组搭配用于，可是英语中一般不连用。句意：尽管他累了，但是他也不停止工作。故选A。