五、回忆一下昨天上午9点钟的时候你周围3个人不同的行为,用过去完成时写出至少3句话。______
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【解析】：题目考查英语八年级过去完成时的运用。需回忆昨天上午9点周围3个人的不同行为，用“had+过去分词”结构造句，体现过去某个时间点前已完成的动作。
【答案】：My mother had already cooked breakfast by nine o'clock yesterday morning.
My classmate Tom had finished his homework before nine o'clock yesterday morning.
The old man had walked for half an hour when it was nine o'clock yesterday morning.