_____ water do you need——A cup is enough(足够的).

______ students should be given more freetime is suggested by many experts and welcomed by kids in school．

ung man, ______ severalattempts to break the world record in high jumping, decided to have anothertry

He_____ down the hole and ________ very sad.

South Korean rapper PSY’s hit song Gangnam Style made history on December 20 as first-ever video on youtube. com to reach 1 billion views.