-- I’d like to invite you to a concert this evening.-- Thank you, but _______ I’ll be free I’m not sure at the moment.
If you don’t like the drink you _____, just leave it and try a different one.
You don’t need to describe her. I _____ her several times.
—Oh, it’s you, I _____ recognize you! —I’ve just had my hair cut. And I _____ my glasses.
—Nancy is not coming tonight. —But she _____!
His father, a famous university professor, who is said to have started his teaching career in Australia, _____ in Nanjing University for more than twenty years.