1 . Please be reminded that         speed limit here is thirty miles per hour.

A．不填

B．an

C．a

D．the

2 . Once you click _______ button , _______ email will be sent to you via your email address .

A．a ; a

B．/ ; an

C．the ; an

D．the ; /

3 . —Have you heard ________ news that over 10,000 people lost their lives in the earthquake in Japan?
—Not yet.What ________ big surprise!

A．the; /

B．the; a

C．/; /

D．/; a

4 . I have ________ European pen friend, and he likes playing guitar.

A．an; /

B．an; the

C．a; /

D．a; the

5 . ________ wish always remains unrealistic that you can come first in the final exam when you make no efforts at all. (用适当的词填空)