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 1T: Hi, what were you doing at 8 p.m. yesterdayS1: I was doing my homework.T: Good. Ask the student behind you the same question.S1: What were you doing at 8 p.m. yesterdayS2: I was watching TV. What were you doing at 8 p.m. yesterdayS3: I was cleaning my room. What were you doing at 8 p.m. yesterday…Activity 2T: Now let′ s see who has the best memory. I was cooking at 6 o′ clock yesterday evening.What about youS 1: I was having dinner.T: Tell your partner like this: Ms. Zhang was cooking at 6 o′clock yesterday evening. Iwas having dinner.S1: 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 wasdoing some shopping.S3: ...根据上面的信息，从下面三个方面作答：(1)该教师设计的两个活动属于什么类型的语法操练活动请简要说明。(2)该设计中存在什么问题(3)针对存在的问题提出合理的建议。
