VII.单项选择。（10分）
( )26．Today we have ______ classes，and the ______ class is math.
A. three；tree B．first；three C．three；third D．third；three
( )27. — Eric thinks English is _________ useful language.
— I know. He reads English for ________ hour every morning.
A. a; an B. a; a C. an; an D. an; a
