单词拼写(本大题共8小题，每小题1分，共8分。根据下列句子及所给的单词首字母，写出各单词的完全形式,每空白处限填一词）
To be h          ,I don’t think we have a chance of winning.
A      is well-known, the environment in China is badly in need of improvement.
I’m sure you’ll s            if you work hard.
Mary’s sister sings b____________ than Susan.
—What c__________ is your new dress? —It’s green.
I can’t talk now, Pam. I’m in a h___________. Bye!
How long will it t         you to build the new building?
—How do you go to school? —I go to school on f_________.