---Jack,you look tired today. What’s wrong? --- I was _______ busy _______ I didn’t go to bed until midnight yesterday.
We find _____ important to use a foreign language well.
—Do you like Zhou Jielun or Liu Dehua? — ________. I am not their fans.
—Do you know who the pen_______? —Sorry ,I don’t know.
They preferred ________ in bed rather than ________ horses.
—Could you pass me _____glass on the table please?—Sure, but it’s _____empty one.