A、Older students will no longer be allowed to live off campus. B、There will be an unusually large number of first-year students.

(16)I need to make sure you understand how to get housing for next year. When you enter as first year student this year, the school assigned you to a dorm and a roommate. But next year as returning students, you’ll choose both your roommate and your dorm. But whether or not you actually get to live in your first choice depends on what number you or your roommate draws in the lottery system.
     (17)The system gives priority to the students who have been here the longest. Fourth year students get the first block of numbers, third years get the second block and second years, like you’ll be, get the third. The lower the number you draw, the sooner you choose. No. 1 gets the first choice, No. 2 gets the second choice, and so on. You can use either your own or your intended roommate’s number to make your room choice. If your roommate for next year has been in the school longer than you have, they’ll be in a better block of numbers and so will have a better number than any second year student. But most of you will probably be rooming with other second year students and so neither of you may have a great number. You may not get into your first or even second choice.(18)Of course, if you’ve made plans to live off campus, you don’t need to enter the lottery at all.(19)Dorm space will be especially tight this year because the dorms on north campus will be closed for renovations. This means that those of you who draw the worst numbers won’t be able to get dorm housing at all. In that case the housing office will help you find off campus housing.
16. Why do the students attending the meeting need the information that is given?
17. What determines which group a student is placed in to choose housing for the next year?
18. Who is not expected to participate in the housing lottery?
19. What special problem will affect housing this year?