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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 was at the cinema at 8 o'clock last night. What about you?

—I________the Internet at home.

Sherlock Holmes asked the suspect what he ________ when the murder took place.

—Tina, I called you last night but nobody answered. What were you doing?

—I a bath.

这个战士正痛苦地躺在草地上。

The soldier{#blank#}1{#/blank#} {#blank#}2{#/blank#}on the grassland{#blank#}3{#/blank#} {#blank#}4{#/blank#}.

When I arrived at his office, he on the phone.

I ___ my breakfast when the morning post came.

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