Zhouqu, Gansu was attacked by such a terrible mud-rock flow few residents had ever experienced before.
Factory workers have to work very hard, and _________.
Only when David did it a second time _________.
So instructive _________ that the student wanted to see it again. A. was the film B. it was the film C, the film was D. the film it was
Not until I went to America _________ what kind of country it was.
_________ forget my hometown and my happy childhood.