用所给单词的正确形式填空,每空一词。

1. My grandfather wants to live in a _________ (peace) countryside.

2. Male ________ (wolf) will protect their families if there is danger.

3. The little pet's        (die)makes me very sad.    

4. We should take the            ( follow ) actions to help the wild animals.

5.______ (sad), we lost the match in the end

如果进栈序列为e1，e2，e3，e4，则可能的出栈序列是

A) e3，e1，e4，e2
B) e2，e4，e3，e1
C) e3，e4，e1，e2
D) 任意顺序