— You ____ very happy. Why?

— Because we are going to spend the evening at Lily's house. [ ]

A. taste

B. sound

C. look

D. smell

按要求改写句子。 

1．护林工人按照命令把灌木统统砍光。   

     改为“被”字句：                                                                                  

2．蜻蜓早就解决了这个问题。 

     改为“把”字句：                                                                                  

3．林务官异想天开的命令给森林带来了灾难。

     改为反问句：