1.Here is ___ old book. But it is ___ useful one.
A.an; theB.an;a
C.the; an
D.an;an
2.There is good ___ for you, I've found your lost watch
A.news B.ideas C.message
D.thoughts
3.When I was walking in the street, I saw a plane ___ over my head.
A.flies B.flying C.fly D. flew
