1 . Two years ago he bought          expensive camera and then he persuaded me to buy          .

A．the; the one

B．a; one

C．the; the one

D．an; one

2 . She told me she had searched the room for the amber _______ day before but without success. （用适当的词填空）

3 . —Did you enjoy yourself yesterday?
—Yes. As you know, ________ party went on in ________ most pleasant atmosphere.

A．the…a

B．the…the

C．a…the

D．a…a

4 . Some experts say ____ birthrate of China, after the one-child policy is relaxed, can see ___ modest increase in future.

A．the, a

B．a, a

C．a, /

D．the, /

5 . The heavy fog in London made _________deep impression on us, which was sometimes so heavy that we lost _________sight of everything around us.

A．a; the	B．a; 不填
C．the; the	D．the; 不填