题目内容：
完成选项Expressing gratitude is an important form of good manners． Nowadays more and more people in China have found it' s high time to11 a thankful heart for the young．
Everyone likes to get praised and appreciated． Gratitude is the greatest of virtues, which lets others smile and makes the world more beautiful．You just need several minutes to write down a thank-you note, but it brings much joy to the 12
We live in a society where we enjoy the different services of others． But 13of them should be taken for granted．
Gratitude is also a kind of 14in life． In developing gratitude for every moment-- for the simple joys and even for the 15times--we come to truly enjoy and appreciate life． Then we are able to see the 16 that surrounds us．
Try to write a thank-you letter to your parents for working hard to17 you a happy life．
Be grateful to your teachers because of their18 with your studies and character building ．Say thanks to your friends who 19both your happiness and sorrow． We are sure it will bring them much joy and add20 into your own life as well．
A．have
B．cultivate
C．share
D．like
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