1 . The food waste in green bags ________ (be) processed on site into pieces to make biogas，which powers the city's buses. （所给词的适当形式填空）

2 . He felt upset the whole day, ___________ （blame）for cheating in the exam. (所给词的适当形式填空)

3 . The young man performed as if he _________ (be) a woman on the stage. (所给词的适当形式填空)

4 . The exhibition is expected ________ (begin) in February next year. （所给词的适当形式填空）

5 . Sonia explained ___________ how she would solve the problem. In ___________, she set an example to others preparing to make a speech.(brief)

7 . Running every morning is of great benefit ________ our health. (用适当的词填空)

8 . Mr. Green stood in defense of the 16-year-old boy, saying that he was not the one _______ ( blame) (所给词的适当形式填空)

9 . If I had enough money, I ________(build) a big house for my parents. (所给词的适当形式填空）

10 . He said that he ________(buy) some story books tomorrow morning. (所给词的适当形式填空）