【C7】A．carelessB．carefulC．carefreeD．cautious

【C9】A．carelessB．caringC．carefulD．care

Packaging is designed so as to encourage impetuous shopping.A．extravagantB．carefulC．impote

【C18】A．rightfulB．carefulC．usefulD．helpful

【C20】A．consciousB．carefulC．worriedD．wary

According to the author, Mr.Obama is______to business.A．carelessB．supportiveC．wiseD．oppose

A．complexB．carefulC．diligentD．elastic