Jack was halfway back to the village where his mother lived Mary caught up with him.
A. when
B. while
C. until
D. though
网友回答
(答案→)A. when
B. while
C. until
D. though
解析：考察连词用法。When在那时（并列连词）；while当…时（从属连词）；结合句意可知A正确。句意：Jack正在回他妈妈工作的村庄的半路上，在这时Mary赶上他了。