1、______ that the pilot couldn't fly through it.

　　A.The storm so severe was　　B.So severe was the storm

　　C.So the storm was severe　　D.Such was the storm severe

　　2、They were surprised at ______ factitious.

　　A.the city　　B.the city's　　C.the city of　　D.for the city

　　3、"Is there anybody who can undertake the job?""None ______ I know of ."

　　A.whom　　B.whose　　C.which　　D.that

　　4、He speaks English as if he ______ a native speaker.

　　A.were　　B.had been　　C.was　　D.be

　　5、The twin sisters are so alike that no one can tell ______.

　　A.who is who　　B.who is whom　　C.what is whom　　D.whom is who