根据句意用所给单词的适当形式填空,

根据句意用所给单词的适当形式填空,
1.We want to do the work for _______________ (us).
2.A good ______________(begin) is half done.
3.She always __________________ (watch) the sunset when she was a little girl.
4.You ____________________(fly) to Beijing in 2008,aren’t you?
5.I don’t like this song because it’s ________________(popular) now.