三、根据要求完成下列各题，每空一词。
1. Mary is doing housework now.(改为一般疑问句)
Mary housework now?
2. Clark is jumping rope at the park.(对画线部分提问)
Clark at the park?
3. My father is reading a book in the living room.(改为否定句)
My father a book in the living room.
4. My friend Gina is talking on the phone.(对画线部分提问)
talking on the phone?
5. Mary plays the violin every evening.(用 now 代替 every evening 改写句子)
Mary the violin now.

1. Is; doing
2. What's; doing
3. isn't; reading
4. Who; is
5. is; playing

四、听下面几段对话。每段对话后有几个小题，从题中所给的 A、B、C 三个选项中选出最佳答案。每段对话读两遍。
听下面一段对话，回答第 1 至第 2 两个小题。
() 1. What are the boys doing?
A. They are playing basketball.
B. They are playing volleyball.
C. They are playing soccer.
() 2. Where does Steve have to go?
A. To the pool.
B. To the library.
C. To the supermarket.
听下面一段对话，回答第 3 至第 5 三个小题。
() 3. What is Tom doing?
A. He is having dinner.
B. He is washing his clothes.
C. He is watching TV.
() 4. Where is Lucy now?
A. At home.
B. At the restaurant.
C. At the supermarket.
() 5. When will they meet?
A. At 5:00.
B. At 5:30.
C. At 6:30.

（此处需根据实际听力内容填写，例如：1.A 2.B 3.C 4.A 5.B）

由于您没有提供听力材料内容，无法直接解答这些听力理解题。这类题目需要根据听到的对话信息来选择答案，建议您仔细听对话内容，抓住关键信息（如动作、地点、时间等）进行选择。
如果您能提供对话文本，我可以为您进行详细解析。