问题:
[单选题]
What is this passage mainly about?
A.
A World Fair held in Chicago in 1893
B.
The popularity of the American candy bar industry
C.
The candy bar industry during World WarI
D.
The spread of the candy bar business to the Midwest,
试题来源参考:成人高考专升本,英语真题试卷,英语答案,英语历年真题,英语模拟试卷,成人高考专升本入学考试