题目内容：

几句英语的完形填空
If you see the world with your warm h( ),you'll find that the whole world smiles to you.
W( ) in school,somethings you are tried of your lessons,but have you ever n( ) the happy smile on your teacher's face when you do a good job?
Maybe you would feel very sad and stard complaining about the weather.But dear friends,why don't you sit down and listen to the free concert that nature o( )you?

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heart
When
noticed
offers