五、听录音，选出正确的应答句。(听两遍)
()1. A. OK.
B. Good.
C. Thank you.
()2. A. It's a book.
B. It's a schoolbag.
C. It's a table.
()3. A. No, it isn't.
B. It's a rubber.
C. It's long.
()4. A. No, I'm not.
B. Yes, she is.
C. Yes, it is.
()5. A. Yes, it's a pen.
B. Here you are.
C. Thank you.

（需根据实际录音内容选择，此处无法确定具体答案）

由于缺少录音内容，无法直接选出正确答案。以下是基于译林版英语三年级下册Unit1常见知识点的解题思路分析，供参考：

1. 若录音为提议或指令（如"Let's go to school."），应答用"OK."（A）；若为夸赞（如"You look good."），用"Thank you."（C）。
2. Unit1核心词汇含"schoolbag"（书包），若录音问"What's this?"且指向书包，选B；指向书选A，指向桌子选C。
3. 若录音为一般疑问句"Is it a...?"，否定回答用"No, it isn't."（A）；若为特殊疑问句"What's that?"，答物品名称（B）。
4. 若录音为"Is it a...?"（如"Is it a ruler?"），肯定回答用"Yes, it is."（C）；"Are you...?"答A，"Is she...?"答B。
5. 若录音为"Here you are."，应答"Thank you."（C）；若为"Can I have a pen?"，答B；若为"Is it a pen?"，答A。

六、从方框中选择合适的选项，补全对话，将序号写在横线上。(有多余选项)
A. It's my pencil.
B. Is it your pen?
C. Is this my pencil case?
D. Guess again.
E. What's this?
Mum: Dear! 1.
Liu Hua: It's my ruler.
Mum: What's that? 2.
Liu Hua: No, it isn't. 3.
Mum: Put your school things in your pencil case.
Liu Hua: OK, Mum. 4.
Mum: No, it isn't. It's your sister's pencil case.
Liu Hua: Oh, yes! Thank you, Mum.

1. E
2. B
3. A
4. C

七、阅读对话，判断句子正(T)误(F)。
Su Hai: Good morning, Mike.
Mike: Good morning. Look! I have a new (新的) schoolbag.
Su Hai: It's nice. What's in your schoolbag?
Mike: Some books, a new pencil case and a picture.
Su Hai: Is it a rubber?
Mike: Yes. It's not big. But I like it.
Su Hai: I like this picture. The cat is lovely.
Mike: Thanks. It's my grandpa's cat. Its tail (尾巴) is long.
()1. It is in the morning.
()2. Su Hai has (有) a new schoolbag.
()3. The rubber is big.
()4. The cat is in Mike's schoolbag.
()5. The cat has a long tail.

1. T
2. F
3. F
4. F
5. T