在英语越来越重要的21世纪，学好英语成了大学生的首要目标。为帮助大学生更好地掌握英语知识，特提供以下文章：
1. He set up in business____ his own and was very successful.
A. in
B. of
C. on
D. by
2. John's score on the test is the highest in the class; he____ last night.
A. must study
B. should have studied
C. must have studied
D. is sure to study
3. Frank almost never received any education____ ?
A. would he
B. did he
C. didn't he
D. wouldn't he
4. Even if his letter____ tomorrow, it____ too late to do anything.
A. will arrive...is
B. should arrive...were
C. arrives...will be
D. arrives...would be
5. We can hear____ from the back of the room.
A. just as good
B. just as easy
C. just as well
D. easily as well