题目：
阅读下列对话选择正确答案。
Dad: Which dog do you like?
John: I like the black dog. It's taller than the white one.
Dad: Do you like the brown one?
John: I think I like the black one. It is stronger.
Dad: I like the white dog. It's younger. Its tail is 6 cm long.
John: The black dog is 20 cm tall.
John: Can I get a new dog?
Dad: No, you have two dogs already!
1. Which dog does John like?[ ]
A. The black dog.
B. The white dog.
C. The brown dog.
2. Is the brown dog stronger than the black dog?[ ]
A. Yes, it is.
B. Yes, it can.
C. No, it isn't.
3. Which dog is younger?[ ]
A. The white dog is younger
B. The brown dog is younger.
C. The black dog is younger.
4. Can John get a new dog?[ ]
A. Yes, he can.
B. I don't know.
C. No, he can't.
答案：
1. A 2. C 3. A 4. C
