问题
单项选择题
As the old empires were broken up and new states were formed, new official tongues began to ______ at an increasing rate.
A. bring up
B. build up
C. spring up
D. strike up
答案
参考答案：C
解析： bring up意为“教育，养育”；build up意为“逐步建立，增强”；spring up意为“迅速成长”；strike up意为“开始(交谈)”。