根据句意及首字母提示完成单词。
1. My sister likes singing very much. She can sing many English s____.
2. He is a m____ school student. He studies very hard.
3. G____ is my favorite subject. I can learn about many countries and cities.
4. She didn't go to the beaches on weekends. She went to the m____ with her parents.
5. The day before yesterday we had a math t____. I got full marks.