【题目】 teaching is often viewed as a hard and demanding(要求高的)job, some people are fond of it and consider it to be rewarding and worthy.
A. Because B. Until
C. Once D. While
在线课程【答案】D
【解析】考查状语从句。A. Because因为； B. Until 直到---为止；C. Once 一旦； D. While尽管。尽管教学常常被认为是一项艰巨而要求高的任务，有些人喜欢它，认为它是值得的。根据句意可知选D。