Once our supplies _______, we will take the risk of starving to death. 

—I haven’t seen you walk your dog recently? Why?—Well, I have _______ the habit, as it _______ too much of my spare time.

 The colors on the national flags can be ______ differently in different culture, but they have one thing in common, that is, ______of the colours was carefully chosen.

Mary _________a professor for half a year. 

The novel “The Da Vinci Code”____a great success and was translated into 44 languages in 2004.