请教：Iwashalfwaybacktothecottagewh?
请教：I was halfway back to the cottage where my mother liv_____Susan caught up with me. A.when B.while C.until D.though 正确答案是A。为什么？请详解
when指"这个时候"的意思. 我的回我母亲居住的小屋的半路上,这时候susan赶上了我.