(2013·安徽，27)This project requires close teamwork.________ will be achieved unless we work well together.

John bought the car at $ 7,000 which is a low price and I doubt whether there has been a ________ price since then.

The bag is ____ as the red one.

At the meeting they discussed three different    ____  to the study of mathematics.

He has ______ lung cancer for several years and is never _______ pain.