Some young people these days just ______ go out of their homes to contact the real world．

—You didn’t invite Mary to the ball?—____ her, too? 

-- ______ I come to London alone? -- Don’t worry, I ______ be meeting you at the airport.

Thank you very much. But for you, I ____ in the fight yesterday.

       Do you know where David is? I couldn’t find him anywhere.      Well, he       have gone far. His coat is still here.