The author of the article believes that it is the test system, ______ teachers, that is responsible for the heavy burden of the middle school students nowadays.

Each person has his / her unique character which ____ him / her from others．

What’s ______population of China—China has_____ population of 1.3 billion.

I walked out of the cinema, ____ I’d never come back to this place again[ ]

I’ve never been to Beijing before.–_____.Let’s go there together this summer vacation.