The book which ______ at the end of last year turned out to be a great success in Shanghai.

It’s one thing to have theories, but it’s _______to put them into practice.

Why are your eyes so red? You _______ have slept well last night.—Yeah, I stayed up late writing a report.

omprehensive surveys have provided the most statements of how, and on what basis, data are collected.

_____ of courage and power