----- Nội dung ảnh -----
**XIII. Read the passage carefully, then choose the correct answer.**
"Where is the university?" is a question many visitors to Cambridge ask, but no one can give them a clear answer, for there is no wall to be found around the university. The university is the city. You can find the classroom buildings, libraries, museums and offices of the university all over the city. And most of its members are the students and teachers or professors of the thirty-one colleges.
Cambridge is already a developing town long before the first students and teachers arrived 800 years ago. It grew up by the river Granta, as the Cam was once called. A bridge was built over the river as early as 875.
In the fourteenth and fifteenth centuries, more and more land was used for college buildings. The town grew faster in the nineteenth century after the opening of the railway in 1845. Cambridge became a city in 1951 and now it has the population of over 100,000. Many young students want to study at Cambridge. Thousands of people from all over the world come to visit the university town. It has become a famous place all around the world.

21: Why did people name Cambridge the "City of Cambridge"?
A. Because the river was very well-known.
B. Because there is a bridge over the Cam.
C. Because it was a developing town.
D. Because there is a river named Granta.

22: From what we read, we know that Cambridge is now __
A. visited by international tourists
B. a city without wall
C. a city of growing population

23: Around what time did the university begin to appear?
A. In the 8th century
B. In the 13th century
C. In the 9th century
D. In the 15th century

24: Why do most visitors come to Cambridge?
A. To see the university
B. To study in the colleges in Cambridge
C. To find the classroom buildings

25: After which year did the town really begin developing?
A. 800
B. 875
C. 1845
D. 1945