根据情景，选择最佳答案。
1．当你要向别人介绍你的朋友大明时，你应说：[ ]
A. This is Daming.
B. Hello, Daming.
2．你的弟弟很调皮，你应该这样描述他：[ ]
A. My little brother is very naughty.
B. This is my little brother.
3．老师夸奖你说：“你是个聪明的男孩。”你用英语回答说：[ ]
A. No, I'm not.
B. Thank you.
4．你的英语老师是一个不错的女老师，大家都说：[ ]
A. She's a bit shy.
B. She's a nice teacher.
5．老师指着身边的一个男孩说：“他非常聪明。”老师应该这样说：[ ]
A. He's very cool.
B. He's very clever.
