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题型：单选题题类：常考题难易度：普通

Can you tell me what you __________ when the teacher came into the classroom?

A、did B、do C、are doing D、were doing

举一反三

I saw Jeff in the park. He _________ on the grass and reading a book.　

—You were out when I dropped by your house.
— Oh, I_________ in Zhongbai Supermarket with my parents.

The boy was _____ on the ground and he had _____ bicycle behind the big tree.

About 100 million people ______ QQ to chat on line at 8 yesterday evening.

The {#blank#}1{#/blank#} (own) of the store was sweeping the floor when I walked in.

用方框中所给词语的适当形式填空

present; somewhere; wait; delicious; as soon as

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