1The university for the aged offers many different courses:computer,music ,English and so on.
courses of computer ,music,English 中式英语,电脑、音乐、英语的课程
2You are cordially invited to a party given at our institute at 1:30 p.m this Sunday.
given at our institute at 1:30 p.m this Sunday做party的定语
3这句两种改法.Computers have came to Chinese families
Computers have been widely used in China(Chinese families)