1 . — Oh, must you? Stay a bit longer. It has been such ________ fun having you.
— Thanks. Anyway, I’ve got ________ early start tomorrow morning.

A．a; an

B．/ ; an

C．/ ; the

D．the; an

3 . As long as you devote yourself to your study, you are sure to make ______ progress.

A．a

B．the

C．an

D．/

4 . I can't remember when exactly he left ________ school and worked as a lifeguard. I only remember it was ________summer.

A．the; the

B．the; a

C．/; /

D．/; a

5 . In face of ________ failure, it is the most important to keep up ________ good state of mind.

A．/ ; a

B．a ; /

C．the ; /

D．/ ; the

6 . Here in our supermarket fruit is sold by ____ kilogram, that is, by _____ weight.

A．the; 不填

B．the; the

C．不填

D．不填; 不填

7 . On ______ Children's Day，Jack received a prize for being ______ honest boy.

A．the； an

B．/； an

C．/； a

D．the； a

8 . The boss wanted an assistant with        knowledge of French and        working experience.

A．the; the	B．the; /
C．a; a	D．a; /

9 . It is generally considered that air pollution is ______ danger to ______ nature.

A．/; a

B．/; the

C．/; /

D．a; /

10 . In communication, a smile is usually _____ strong sign of a friendly and _____ open attitude.

A．a; /	B．the; /
C．a; an	D．the; an