这个班上有30位学生,大多数来自城市
There are thirty students in the class ,most of whom are from the city.
他是当时唯一在场的人
He is the only person who was present at the time
凡是你知道的关于本书作者的情况请都告诉我.
Please just tell me everything that you konw about the auther of the book
请递给我那本绿皮的书
Please pass me the book whose cover is green