2. 职称英语
  3. He had already walked three or four miles ______ he saw a cart, half-full of hay

He had already walked three or four miles ______ he saw a cart, half-full of hay

游客2025-03-10  29
问题 He had already walked three or four miles ______ he saw a cart, half-full of hay, by the side of the road.
选项 A、while
B、when
C、the moment
D、unless
答案 B
解析 when“这时(突然)”。常见的搭配有：be doing…when…；be about to do…when…；had done…when…。例如：I was walking in the street when someone called me from behind.我走在街上，突然有人从后边喊我。I was about to go out when he came in.我正要出门，突然他进来了。
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