China as she is,is very different from China as she is twenty years ago

为什么两个地方都用as she is
China _______,is very different from China ______ twenty years ago.
A.as is;as was
B.as she is;as she is
C.as she;as she
D.as it is;as it is

为什么选B
为啥第二个空不是was

China as she is,is very different from China as she is twenty years ago She is clever as well as beautiful. She is as plain as her mother is beautiful she is ----as any of us one old lady is going to leave her job and she wants to find a job as language teacher in china 翻 She is as old as me 有错吗 改错 Clever as she is , but she works very hard. young as she is ,Mary is a most social person China is no longer what she used to be Mary is an American doctor.She is now in China.She works in a hospital in Hangzhou.She is also