Hi, Mike. Have you been to Disneyland in Shanghai—Yes. I _______ there last month.

We should work together to build a society for kids, ________free from war and violence.

I think that you have made rapid _____ in math.

There __________ a big celebration at the school hall this evening.

Have you really been to visit the Bird’s Nest in Beijing?　 —- I ______ it last summer vacation.