2个从句的习题.1.A body of volunteers____to aid the helpless in their struggle for survivalA.has been organized B has organizedC have been organized D have organizedA 为什么用单数?为什么是被动?求翻译2.No boy and no girl____admitted to enter the roomA.is B are C has D have been 首先根据：当and连接的复合主语都为单数且前面被no,each,every,many a ,more than one/a等修饰时,常当作单数来看待,其后面的谓语用单数形式.然而,如果在复合主语中,其中一个是表示肯定意义,而另一个表示否定意义,其谓语动词须与肯定的主语保持一至.boy和girl 是单数,且后面有个admitted那前面应该接has答案怎么是A

2个从句的习题.
1.A body of volunteers____to aid the helpless in their struggle for survival
A.has been organized B has organized
C have been organized D have organized
A 为什么用单数?为什么是被动?求翻译
2.No boy and no girl____admitted to enter the room
A.is B are C has D have been
首先根据：当and连接的复合主语都为单数且前面被no,each,every,many a ,more than one/a等修饰时,常当作单数来看待,其后面的谓语用单数形式.然而,如果在复合主语中,其中一个是表示肯定意义,而另一个表示否定意义,其谓语动词须与肯定的主语保持一至.
boy和girl 是单数,且后面有个admitted那前面应该接has
答案怎么是A