Complete each sentence with a correct preposition or adverb. (介副词填空) 1). My brother, who used to be very lazy and rebellious, has recently transformed himself _________ an excellent, hard-working student. 2). As a student, it’s important to have friends you can rely __________________. 3). It’s considered normal for young people to rebel ____________ their parents’ ideas for a certain period of time. 4). The money collected _____________ people who attended the talk was used to pay the organizers’ expenses. 5). The passage about the University of Bologna is based ________ a great deal of research. 6). Students in the sixties found many things to protest ____________. 7). In America, huge numbers of students protested _____________ the Vietnam War. 8). The head of the university was eventually forced to resign __________ his position.