In 1948, three American scientists invented ______ transistor, which is ______ small electronic device to control an electric current．

A． the; a               B． a; a              C． the; the              D． a; the

I would appreciate ______, to be frank, if goods could be delivered as soon as possible．

A． you            B． this         C． it           D． myself

—What do you think of Harry Potter and the Philosopher’s Stone?

—Fantastic．Steven Kloves ______ each character in the movie impressive through lively dialogues and fascinating plots．

A． makes       B． would make          C． made           D． had made

______ I failed in English a third time, I had no doubt about my gift for foreign languages．

A． By the time            B． Until            C． After          D． Unless

During job interviews, many graduates use the reputation and image of their schools to the full, ______ themselves to employers．

A． presented                                        B． to have presented

C． having presented                                D． to present

The dress is really fashionable and eye-catching, but it is ______ too big for me．

A． fairly          B． rather         C． quite          D． pretty

It is said that the meeting ______ for three hours．Why should I regret missing it?!

A． has lasted         B． has been lasting          C． lasted          D． had lasted

The health official said ______ 12 suspected cases of influenza A （H1N1） were tested negative and ______, so far, this city has reported no case of the virus．

A． what; that          B． that; what          C． 不填; that          D． that; 不填

—Hi, Johnson, any idea where Susan is?

—It’s class time, so she ______ in the classroom now．

A． can be       B． must have been       C． might have been          D． should be

China’s new food law provides for a food recall （召回） system ______ producers have to stop production if their food isn’t up to standards．

A． where         B． that          C． when          D． which