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  37
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。I had hardly finished bathing when the electricity went off．我刚洗完澡，就停电了。
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