根据旬义，用括号内所给词的适当形式填空.
Although the film is very           (enjoy)，it is a bit long.
In foggy days，people should pay attention to their         (safe)while walking in the street．
The harder you study,the         (much)you will get．
Christmas is the most important holiday in         (west)countries.
Our teacher always tells us to listen          (care)in class．