题目

I have made a time machine. It can take people to the past or the future for five hours. I thought that it would be fun to see what my father was like when he was 10 years old.I got into my time machine and keyed in the words, “1981, 11 Niven Road, New York ” then pressed the button … In a moment, I was in front of a house, 11 Niven Road.I saw four children looking for a lost dog. They were my father, my uncle Tom, my aunts Peek and Janet. I went up to them and helped them look for their dog, Jack.We wanted to climb a hill and looked for Jack. When we reached the top, we heard a dog bark在青春期，生殖器官发育加快，与此关系最密切的是（ ）A.性激素 B.甲状腺激素 C.生长激素 D.胸腺激素