用一般过去时或过去进行时填空

题目

用一般过去时或过去进行时填空
1.they arrived while we ________ （cook) the meal
2.it ________ （rain） very heavily when i got off the train
3.John ________ （remember） his passport just as he was leaving the house
4.idropped the milk while i ________ （make） some coffee in the kitchen

答案

were cooking
was raining
remembered
was making