根据提示完成句子 1. He ever had many _________( opportunity) to visit Beijing, but he gave them up. 2.  Your homework must _________( finish)  this evening. 3. Volunteering in the hospital is a good _________ ( experience) for me. 4.  He often _________( study)  foreign books with his friends. 5. Do you have to wear_________ ( uniform) at school? 6. __________(目前 ) , children under 14 are not al lowed to go to bars. 7. We should _________ (集中于) the study. 8.  Last year I _________(有机会) to study in foreign countries. 9. You say that the baby can stay at home by himself, but I_________(不同意) you.  I think it's dangerous. 10.  Getting up early ___________(对……有益处)your health.