比较C语言与C++语言，最明显的差异在于（）。
A.输入输出流
B.数据结构
C.流程控制
D.类
参考答案：D
Great changes ______ in the city and a lot of buildings ______.
A．have taken place, have been set up
B．have been taken place, have been set up
C．were taken place, were set up
D．have taken place, set up
I'll never understand how it _____ that he still insisted on going there alone after being told about the
possible danger. [ ]
A. came about
B. came across
C. came out
D. came up
