说明
one more step and...
核心问题
Five minutes earlier, ____ we could have caught the last train. A. and B. but C. or D. so(全国四级,93.6-42)
对于这道题我简直搞不清楚。
词典解答
我们在 and 条中已经讲过，可以用祈使句表示条件，而用 and 分句表示结果。与此相类似，也可以用名词短语来表示条件，而用 and 分句来表示结果。上面的句子相当于 If we had arrived at the station five minutes earlier, we could have caught the last train.（如果提早 5 分钟到达火车站的话，我们就赶上最后一班火车了。）下面是类似的例句。
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One more step and I'll shoot. (CGEL) 你再走一步,我就开枪。
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A few months more and the hydro-electric station would be providing power. (NP) 再过几个月, 水力发电站就发电了。