—Would you like to come to my birthday party on Sunday?—______, but I have to visit my uncle with my mother.
—Shh! ________! The film has begun. —Oh, I’m sorry.
I think the Grand Canyon is unusual natural wonder of the world.
—Our country _____ progress in science and culture in recent years.
When we went into the park, we saw someone _____ Chinese Kungfu.
—Have you ever _____ Mudanjiang to see the Jingbo Lake? —Yes, I have.