The longer I worked with Mr. Smith, the more I realized ______ in computer technology.
A) how skillful he was C) how was he skillful
B) how he was skillful D) how skillful was he

A．The longer I worked with Mr. Smith, the more I realized ______ in computer technology.
B．how skillful he was
C．how he was skillful
D．how was he skillful
E．how skillful was he