一道改错题:
Students of United States history, seeking to verify the circumstances that encouraged the emergence of feminist movements, have thoroughly investigated the mid-nineteenth century American economic and social conditions that affected the status of women.
错误之处是verify
词典中既有United States history的例句,也有the United States history的例句,所以是加the或不加the都可以吗?
期待各位老师解答,感谢!