根据句意选词填空。注意每个单词的正确形式。
already,  play,   check,  one,    be
It’s a good idea _____________ your vocabulary notebook every day.
Spacecraft have __________ been to Mar.
The __________ prize is the holiday of your dreams in England.
–Where have you _________ these days?     --To Beijing.
The little boy practises ___________ the violin every day.