1.When Mr.Ruiz arrived at the holiday sale,she realized that

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1.When Mr.Ruiz arrived at the holiday sale,she realized that she had left her wallet at home and （must go） back to get it.No error 括号里哪里错了?
2.When Dr.Jantos speaks,she does not attempt to impress her （listener with her speaking）.括号里哪里错了?
为什么要had to go?must go不行?
must不能用在过去式？

1 must 只有一般现在时和过去式用 had to do强调客观因素导致（钱包掉家了）不得不回家.must是主观上或规定导致.比如会友间接电话,说一句i have to go
交通上 When the traffic light is red,you must stop.
2 对比一下
Our teacher impressed us with the importance of industry and economy.
老师要我们牢牢记住勤奋节俭的重要性.
给...极深的印象;使感动[W][H]
I was very impressed by his story.
他的故事深深打动了我.

1.When Mr.Ruiz arrived at the holiday sale,she realized that When she arrived,she found that the letters____(take) away I realized at once that I had done it wrong when she told me When I was at the grocery store,I realized that the prices o Mr.Cruce hardly had arrived at the station when the train pu When the plice arrived,she told police that she saw the thie She was answering the phone when the manager arrived at the when I ____her,I realized that she was not Jane she arrived at the airport only to find that she had missed 10道英语选择题题1.That day she arrived at 4:30 and was () in the VI so early that when he arrived at the city,the gate was still .when she arrived,the plane( )away