按要求改写句子。     

1．小嘎子摔了个仰面朝天。     

改为“被”字句：                                                                                          

2．你莫不是还有两个亲人不曾见面？ 

 改为陈述句：                                                                                                  

3．天下有这样标致的人物。  

改为反问句：                                                                                                   

 4．严监生是一个很有钱的人。 

改为双重否定句：                                                                                              

既能清热泻火，又能生津润燥的药物是（）

A.石膏

B.芦根

C.知母

D.桑叶

E.栀子