What we have to admit is that never in the past thirty years _______ so greatly as today.[ ]
A. did China change
B. China has changed
C. has China changed
D. China had changed
答案:C
What we have to admit is that never in the past thirty years _______ so greatly as today.[ ]
A. did China change
B. China has changed
C. has China changed
D. China had changed
答案:C