Поставьте глагол сказуемое одного предложения из текста во все временные формы группы Perfect, произведя все необходимые

Поставьте глагол сказуемое одного предложения из текста во все временные формы группы Perfect, произведя все необходимые смысловые изменения.

When people speak about the universities of Oxford and Cambridge together and want to distinguish them from other British universities they usually use the word "Oxbridge", which is made up from the names of the two universities - Oxford and Cambridge. To use one word "Oxbridge" is quite natural because both universities do not differ greatly and have much in common. Oxford and Cambridge universities date back to the Middle Ages and have always been the universities for gentlemen. Now in both there are colleges for women. Each university consists of a number of semi-independent colleges. To become a student of Oxford or Cambridge one has to take an entrance exam in addition to "A" levels and after that he (she) may be accepted at one of the university colleges.
The teaching in both universities is based on the tutorial system. Students have tutorials called supervisions at Cambridge. Every student has a tutor who plans his (her) work. The student has to write essays and papers on the subjects he (she) is studying. The student is also required to submit regularly the results of his (her) work to the tutor who gives advice and helps him (her) in time of need.
Both universities are believed to be the best institutions to get education at. Most graduates of Oxbridge are former students of famous public schools. An Oxbridge degree is highly valued and recognized by the public and the government. As a rule most Oxbridge graduates get leading positions in Britain and become politicians, MPs and prime ministers.
In both universities students wear gowns. As for Oxford students, when taking exams or being at a degree ceremony, they have to wear a gown on top of their academic dress consisting of a black suit or skirt, black shoes and socks or tights, a white shirt or a blouse and a black tie. Besides they have to put on a black hat with a flat, square top. Cambridge students wear gowns when they become members of the university and at graduation.
The students of Oxford and Cambridge always compete with each other. They are rivals in academic affairs, in debating and sport. Rugby and cricket teams competitions as well as the Boat Races held each year attract public attention. Each May the river Thames, known at Oxford as the Isis, becomes like a Venetian carnival when colleges row against each other. Crews try to bump the boat in front of them. The leading crew at the end of four days wins the title Head of the River