AFFIRMATIVE

我昨晚八点在看书。

I ___was ___reading a book at eight o'clock last night.

她昨天下午一直在给朋友写信。

She ___was ___writing a letter to her friend yesterday afternoon.

他们正在公园里散步时，天开始下雨。

They ___were ___walking in the park when it started to rain.

我们那天一直在等公交车。

We ___were ___waiting for the bus that day.

我给你打电话的时候，你正在睡觉。

You ___were ___sleeping when I called.