He found his house broken into and many things stolen _______ his return from office.
He would have come here on time, but he _____ in the heavy traffic on the way.
— Why is the librarian staring at me? — You _____ to read aloud in the reading room.
_____ Li Ming and Xiao Fang, there were also many other students attending the lecture.
The number of _____ species increases every year with their natural habitats disappearing.
________ of the land in that district(地区) _______ covered with trees and grass.