China recently control its waters near the HuangYan Island to prevent Chinese fishing boats from ____in the South China Sea 

______ more effectively in the future, many people equip themselves with further education.

I wondered whether the movie was _____ worth _____.

 As the mid- examination is coming , the students are busy ____ it.

(2012·昆明高二检测)It is well-known that proper amounts of exercises, if _______ regularly, will benefit our health.