1 . There is ________ “r” in the word right.

A．a

B．an

C．the

D．/

2 . I have ________ important dinner at 6:30 this evening.

A．a

B．an

C．the

D．/

3 . Xiaoxue often plays ________ instrument after school.

A．a

B．an

C．two

D．/

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

A．a

B．an

C．the

D．/

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

A．a

B．an

C．the

D．/

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

A．a; a

B．a; an

C．an; an

D．the; a

7 . —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

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

A．a

B．an

C．/

D．the

9 . Shanghai has ________ international film festival every year

A．a

B．an

C．the

D．/

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

A．a

B．an

C．two

D．/