[综合题]教学情境分析题根据题目要求完成下列任务，用中文作答。下面是某初中教师在教授了“过去进行时”这一语法内容之后设计的练习活动。

Activity 1

T: Hi, what were you doing at 8 p.m. yesterday?

SI: I was doing my homework.

T: Good. Ask the student behind you the same question.

SI: What were you doing at 8 p.m. yesterday?

S2: I was watching TV. What were you doing at 8 p.m. yesterday?

S3: I was cleaning my room. What were you doing at 8 p.m. yesterday? 
...



Activity 2

T: Now let's see who has the best memory. I was cooking at 6 o'clock yesterday evening. What about you?

SI: I was having dinner.

T: Tell your partner like this: Ms. Zhang was cooking at 6 clock yesterday evening. I was having dinner.

SI: Ms. Zhang was cooking at 6 o'clock yesterday evening. I was having dinner.

S2: Ms. Zhang was cooking at 6 o'clock yesterday evening. S1 was having dinner. I was doing some shopping.

S3: ...

根据上面的信息，从下面三个方面作答：