When someone is hungry, he won’t be _______ about what he eats.

Studies show that people are more ______ to suffer from back problems if they always sit before computer screens for long hours. 

------ How was your trip to Yungang Caves during your National Day holiday?-------- Wonderfully! I’ve never had _______ one before．

—George is a wise person .—But in my opinion , he is         than wise .

 It seems that Jenny is a(n)______lady, for she always works more than 12hours a day.