Those experienced doctors in our country _______the meeting in order to find out the real_______ of bird flu(禽流感).
Since I won the big prize, my telephone hasn't stopped ringing. People ____to ask how I am going to spend the money.
John ___ be a basketball player.He’s much too short.
See who’s there! ____ it be Mary?
“Can I take it away?” “You ___ better not.”
“Let’s go to the library, shall we?” “____”