我们每个人承担的责任,有主有次,有轻有重,最重要的应该( )
Having finished her project, she was invited by the school __________ to the new students.
Bill suggested __________ a meeting on what to do for the Shanghai Expo during the vacation.
Susan wanted to be independent of her parents. She tried __________ alone, but she didn't like it and moved back home.
Lydia doesn't feel like __________ abroad. Her parents are old.
After many years of hard work,his dream was finally __________.