_____ is well known to everybody is that Nanning ,Wuhan,Chan
_____ is well known to everybody is that Nanning ,Wuhan,Changsha and Chongqing are extremly hot in summer.A.It B.as C.that D.what 答案选what,as is known to everybody,it is known to everybody that,what is known to everybody is that 不是都适用吗,为什么只能选what