根据下列短文内容，在短文后的空格处填上一个恰当的词，使短文完整、通顺。
Life is a learning process(过程). Experiences in life teach us new lessons and make us a better person. With each passing day, we learn to   1 with different   problems.
◆ Happiness and sadness
True happiness comes   2  hard work. Whatever we do, do it well. Putting on a happy face and thinking interesting things are helpful to have happy feelings. Helping others is   3  a good way. When happiness comes, sadness goes away.
◆ Failure and Success
Failure shows   4  the right way, makes us grow up and teaches us how to be successful. As the old saying goes, ”Failure is the mother of success”. Don’t be   5  of failure.
◆ Hope and Despair(绝望)
Hope is what keeps life going. Hope makes us dream. Life teaches us not to
give up hope even in the darkest hours, because    6  every night there is a new day. Whatever   7 , just keep moving on in life and be hopeful.
Life teaches us not to feel sorry for    8  , for it has passed and can not be called back. Tomorrow is unknown, for it could either be bright or dark. So the only choice is to work hard today, so that we will enjoy a better tomorrow.