Nowadays we can obviously feel that the Net our life rapidly. A. had changedB. changedC.

问题补充：

Nowadays, we can obviously feel that the Net our life rapidly.

A. had changed

B. changed

C. is changing

D. was changing

答案：

A. had changed

B. changed

(答案→)C. is changing

D. was changing

解析：考察时态。根据nowadays和句意可知本题是与现在进行时连用。句意：现在文明能清楚地感觉到网络正在改变迅速我们的生活。