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 S1: I was doing my homework. T: Good. Ask the student behind you the same question. S1: 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 S 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。