根据设置的情景，选择正确的答案。

1. 你想知道别人的年龄，你可以问：[ ]

A. How many?

B. How old are you?

C. How are you?

2. 别人问“你来自哪里”，你可以回答：[ ]

A. I'm from China.

B. I like pandas.

C. Where are you from?

3. 你想知道有多少份礼物，你可以问：[ ]

A. How many candles?

B. How old are you?

C. How many gifts?

4. 你向别人介绍你的朋友，你可以说：[ ]

A. This is my friend.

B. I have a friend.

C. This is my teacher.

5. 别人问你汤勺在哪里，你可以回答：[ ]

A. The plate is in the middle.

B. The spoon is beside the fork.

C. The knife is on the right.

光周期影响许多动物的性行为，该过程的调节方式为（）。

A.神经调节

B.体液调节

C.神经——体液调节

D.体液——神经调节