1.���� They sat/were sitting at the fire when a strange noise interrupted their calm.
2.��� I cannot answer you. I have not read/did not read the book yet.
3.��� We went/have gone to the beech every day last summer.
4.��� Stop! There is someone at the door and he is knocking/knocks loudly.
5.��� The trees grew/have grown a great deal since last spring.
6.��� What do you usually do/are you usually doing in your free time?
7.��� Where is Samantha? I think/am thinking she paints/is painting the floor in her room.
8.��� While mother washed/was washing dishes Elizabeth sneaked/was sneaking out.
9.��� We did not find/have not found the ring that Mary lost/was losing on her birthday.
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