As there are so many people about,the dogs have to be kept in enclosure.这句话为什么要有about?有as表示因果关系不就行了吗?

there are twice as many apple as there are twice as many apple as there are twice as many apple as There are _________in class four as in class one.A.so many students B.as many students和翻译 There are so many cars.对so many 提问 There are so many （ ）signs here Why are there so many questions? why are there so many worries everyday? There are twice as many A as B=A are twice as many as 1.There are ___ students in Class One ____ in Class Two.A.as many,than B.as much,as C.more,than D.so many,as另外我还想到一个选项E.as many,as请问答案是哪个,为什么?其他的为什么错了?as many n(pl.)as 和so many n(pl.) as 有 there are so many rules .it is so t＿ There are many h___ in China.Such as Spring Festival,the Dragon-Boat Featival and so on. 翻译：There are twice as many giant pandas as before there are twice as many women as men.翻译 there are twice as many giant pandas as before.原文 there are twice as many sellers as buyers 怎么翻译 there are three times as many girls as boys是什么意思 There are( )students in Class One ( ) in Class Two.28、There are( )students in Class One ( )in Class Two.A．as many,than B．as much,asC．more,than D．so many,as