题目内容：
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?
S 1: 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 6o'clock yesterday evening.
What about you?
S 1: I was having dinner.
T: Tell your partner like this: Ms. Zhang was cooking at 6o'clock yesterday evening. I was having dinner.
S 1: Ms. Zhang was cooking at 6 o'clock yesterday evening. Iwas having dinner.
S2: Ms. Zhang was cooking at 6 o'clock yesterday evening. S1was having dinner. I was doing some shopping.
S3:...
根据所给信息从下列三个方面作答。
(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。(6分)
(2)该设计存在什么问题?(12分)
(3)针对存在的问题提出合理的建议。(12分)
参考答案：
答案解析：