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21£®I took a taxi and arrived at          airport just in time to see          president off.

     A£®a ; the                 B£®the ; a                 C£®a ; a                    D£®the ; the

22£®— Let’s surf the Internet and download some new songs.

    —         

     A£®No way!                                             B£®Why not?           

       C£®It’s my pleasure.                               D£®Me, too!