题目内容
He had already walked three or four miles ________ he saw a cart, half-full of hay, by the side of the road.
[ ]
A.while
B.when
C.the moment
D.unless
答案:B
解析:
解析:
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解析:when“这时(突然)”。常见搭配:be doing…when;be about to do…when;had done…when 拓展: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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