下列关于甲状腺激素的叙述，正确的是()

A.能调控生长发育

B.使机体对儿茶酚胺类的反应降低

C.血浆蛋白结合率低

D.可使呆小病患者痊愈

E.以上说法均正确

根据句意及首字母（汉语）提示，补全单词。

1. He used to b______ badly in class.

2. John has a______(问题)and I can't help them.

3. I am h______ than I should be.

4. She always feel s______ and tired. She should go to see a doctor.

5. When he was young,he got t______ a hard time living in the countryside.