There is a possibility that these hens could be frightened and lay fewer eggs, ____ a sudden loud noise. [ ]

(2013·北京四中高三质检)There is________as a free dinner in this world.As the saying goes，“No pains，no gains.”

Green represents________and nature. When you feel weak, you can wear green.

Who is the woman ____ is sweeping the floor over there?

Do you think cinemas ______ by TV and computers in the next century –– Maybe.