1 . It’s ________ common knowledge that light travels faster than sound.

A．a

B．an

C．the

D．/

2 . Using paper only on one side is ________ waste.

A．a

B．an

C．the

D．/

3 . Yesterday, Grandpa told us _______ story about _______ ant and a grasshopper.

A．a; a

B．a; an

C．an; an

D．the; a

4 . —You’ve missed ______ “s” in the word “grasshopper”.
—Oh, ______ letter “s” should be doubled.

A．a; a

B．an; a

C．an; the

D．the; the

5 . Mary’s mother is ________ engineer in that factory.

A．a

B．an

C．/

D．the

6 . Shanghai has ________ international film festival every year

A．a

B．an

C．the

D．/

7 . —We will take ________ exam tomorrow.
—Good luck to you.

A．a

B．an

C．two

D．/

8 . We are going to have ________ party on Father’s Day.

A．a

B．an

C．the

D．不填

9 . Mr Li is ________ art teacher. He uses lots of games in his teaching.

A．a

B．an

C．the

D．/

10 . As far as I know, ________ movie Full River Red （《满江红》）is ________ huge hit at the box office（票房）.   

A．a; an

B．/;        the

C．the; a

D．an; /