You (will not able) to pass the examination (unless) you work (harder) than you (do) now.()

A. Happiness often goes hand in hand with pain.
B. One must know how to attain happiness.
C. It is important to make commitments.
D. It is pain that leads to happiness.

A. Being aware of your own potential.
B. Trying to reduce cultural misunderstandings.
C. Dreaming with more people from other countries.
D. Establishing a good relationship with people from other cultures.