When Tim ___ why he was late for school, he just kept silent.
—Mr. Smith, would you please speak a little more ________? —Sorry! I thought you could follow me.
—How clean the room is! —Yes,I am sure that someone _______ it.
________ mothers can't come to the meeting because they have gone to Dalian.
—Where is Lily?—Oh, she _______the volleyball match on the playground.
The Olympic Games of 2016 will____ in Brazil.