A:①④
B:①②③
C:①③
D:②③④
完形填空
(1) is an American girl. (2) name is Helen. And this is Mike. (3) is an English boy. Mike can (4) his name. Kate can sing ABC song. Mike's home phone number is 658-4323. He can (5) Kate at 954-3643. They (6) friends now.
关于人体激素的叙述正确的是( )