单词填空：从方框中选择恰当的单词填入句子中，注意使用其正确形式。( 每题0.5分，共4分。答案请写在答题纸上)

delight          arrange         pollute        lack    approve          acquire        recycle       quarrel

I'm ___________________ that we have settled the matter.
He spent years ___________________ his skills as a photographer.
Beth __________________ a meeting with the marketing director.
Don will only buy the motorcycle if his parents _____________.
I could hear them ____________________ next door.
Plastic bottles can be ______________ into clothing.
The river has been seriously ______________ by a chemical factory.
Tom ____________ confidence and needs a lot of encouragement.