题目：
将下列问句的正确答语的序号填入题前括号里。
1. What do you see?[ ]
A. I see two tigers.
B. I can see two tigers.
2. What are the elephants doing?[ ]
A. It's drinking water.
B. They are drinking water.
3. Can you see the birds? [ ]
A. Yes, I can.
B. Yes, I see the birds.
4. What is the monkey doing?[ ]
A. They are swinging.
B. It's swinging.
答案：
1. A 2. B 3. A 4. B
