完形填空（共10小题；每小题1分，满分10分）
请先阅读下面的短文，掌握其大意，然后在每小题所给的A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
Think of life as a game in which you are playing with five balls in the air. You name them work, family, health, friends and spirit and you keep all of them in the air. You will soon understand that    is a rubber ball. If you drop it, it will bounce（弹跳）back.
But the other four balls, family, health, friends and spirit, are made of    .If you drop one of these, they will be broken. They will     be the same. You must understand that and try to have balance in your life. How?
Don't look down on your   by comparing yourself with others. It is because we are different and each of us is special.
Don't let other people set    for you. Only you know what is best for yourself.
Don't give up when you still have something to give.     is really over until the moment you stop trying.
Don't be afraid of difficulties. It is by taking chances that we learn how to be    .
Don't    love out of your life by saying it's impossible to find. The quickest way to receive love is to give it; the fastest way to lose love is to hold it too tightly; the best way to keep love is to give it wings.
Don't run through life so fast that you forget not only    you've been, but also where you are going.
Don't be afraid to learn. Knowledge is a treasure you can always carry easily.
Don't use time or words    .You can't get them back. Yesterday is history,
tomorrow is a mystery, and today is a gift; that's why we call it "the present" Life is not a competition, but a trip, step by step.

A．work B．health C．friend D．family

A．wool B．leather C．glass D．wood

A．still B．never C．even D．also

A．use B．cost C．price D．worth

A．difficulties B．goals C．records D．problems

A．Everything B．Anything C．Nothing D．Something

A．brave B．happy C．curious D．modest

A．take B．get C．shut D．catch

A．how B．who C．where D．what

A．carelessly B．excitedly C．cheaply D．differently