1 . There has been a positive reaction________ the garbage sorting policy which will help reduce the environmental pollution. （用适当的词填空）

2 . The institute was set up in the early 1990s by Dr Jane Goodall, who’s the world’s best-known expert ______ wild chimpanzees. （用适当的词填空）

3 . We couldn’t be ________ ________ ________ (感激不尽) what he did. (根据汉语提示完成句子)

4 . I have a ________ ________ (偏好)sweet food. (根据汉语提示完成句子)

5 . I should be bravely________(对……负责) my mistakes. (根据汉语提示补全句子)

6 . Hungry and exhausted, the boy cheered up _____ the sight of the inviting food. (用适当的词填空)

7 . The lady still keeps jogging even in her ________ (ninety). (所给词的适当形式填空)

8 . It’s important to meet friends in person _____ _____ _____ _____(有时；偶尔). （根据汉语提示填空）

9 . You don’t meet our need. _____ _____ _____(换句话说), you are fined. （根据汉语提示填空）