In our city, _______ middle school students want to work as a teacher in the future.[ ]

A. thousand

B. thousand of

C. thousands of

D. two thousand of

小明同学设计了四个历史小论文题目：

①瓦特与蒸汽机；②美国独立战争中的罗伯斯庇尔；③英国资产阶级革命中的克伦威尔；④麦哲伦环球航行。

错误：_____________________________________________________________________________________

改正：_____________________________________________________________________________________