试题题干
Directions: Read each of the following sentences carefully, and choose A,B,C or D that has the closest meaning to the underlined word or phrase.
Livestock raising, which is big business in the central region of the United States, is also undergoing many changes.（）
参考答案
正确答案：
试题解析
undergo经历；go about处理；experience经历；go on继续；get along相处。
句意：畜牧业是美国中部地区的大产业，也经历了许多变化。