The palace caught fire three times last century, and little of the original building _________[ ]

_______ is even important is ______ as the earth cooled down, water began to appear on its surface.

The door was open and on the ground________. [ ]

How did your students express their thanks to you on Teachers’ Day? — A gift, together with many flowers ______ sent to me by my students

It took me two weeks reading the novels written by Guo Jingming.