请根据句意或括号中的中文提示、英文释义，写出句中所缺单词，使句子通顺。  

1. After the meal something went wrong with the children's _________( 胃).

2. I can talk to my friend about anything, because she can keep s________ .

3. My English teacher always ______ a smile on her face and looks happy.

4. Exercising more is good for your_______( 健康).

5. The girl _________ (get)many greeting cards for her 15th birthday last year.