At a rough estimate, Nigeria is _________ Great Britain.

Sandy could do nothing but _________ to his teacher that he was wrong.

How was your recent trip to Sichuan?—I’ve never had_______ one before.

What’s the low-carbon(碳) life style like?—-Save energy, produce carbon.

Mum, I ______ the theatre for minutes, but I left my ticket at home.— Don’t worry, honey, I will take it to you.