各位师友大家好,这道题解答时遇到了一些问题,我和一些朋友讨论了一下,感觉paid; was to pay; was paying好像都不算错,请教各位师友有没有一个相对客观的答案
When he (pay) the bill in the restaurant, Mr. Smith suddenly realized that he had left his wallet in the car.
感谢各位
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