—People find it hard to get across the river．—I think at least two bridges         over it．

 — Can you play the guitar?       — _________________. 

—_________ I take some photos in the hall, sir?  —No, you _________.

—Must I make a phone call to him now?  —No, you________. You ______ write an email.

  —The winner is a tall and thin boy with glasses!—Well，it________ be Mike.  He doesn’t wear any glasses.