企源知识库

Dr. Bethune began to work the _____ he arrived at the front.
A、moment
B、place
C、way
D、reason
【正确答案】：A
【题目解析】：the moment 引导时间状语从句,意为“一……就……” 句意:白求恩大夫一到前线就开始了工作。