Oxford became a town before (21) ________. Oxford University began to establish itself in the middle of the (22) ________ century and by 1300 there were 1,500 students. At this time Oxford was a (23) ________ town, but by the middle of the 14th century it was poorer because of (24) ________ in trade and the terrible plague. Relations between the students and the townspeople were very (25) ________ and there was often (26) ________ in the streets. On 10th February 1355, a (27) ________ began, which lasted two days. Sixty-two students were killed. One of the punishments was that the University was given (28) ________ of the town for nearly 600 years. 　　There are some special Oxford words in the Oxford English Dictionary. For example, (29) ________ and (30) ________.