成人英语三级考试

根据网考网考试中心的统计分析，以下试题在2018/1/2日成人英语三级考试习题练习中，答错率较高，为：44%
【单选题】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

网考网参考答案：B，答错率：44%
网考网试题解析：
[考点] when的用法 [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。 查看试题解析出处>>