Question

_ What ______ useful book!
_ Is it _____ one that you borrowed from Mr Green yesterday?.

A．an, the

B．a ,an

C．the, /

D．a, the

Answer 1

D

不定冠词有a和an两种：a用于辅音音素开头的词前，an用于元音音素开头的词前。The是定冠词，表示特指。