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

You spent 300 yuan on a pair of cotton gloves. Such a pair of cotton gloves _____be worth so much.

—I hear you ____ in a pub .what’s it like?—Well ,it’s very hand work and I’m always tired , but I don’t mind.

Many fine cooks insist on ingredients of thehighest quality

Our research has focused on a drug which is so powerful 　　　　able to change brain chemistry.