问题详情:
The numbers of the South China tiger ______ fallen in the last few years.
A. have been B. have C. had D. had been
【回答】
B
知识点:动词时态
题型:选择题
问题详情:
The numbers of the South China tiger ______ fallen in the last few years.
A. have been B. have C. had D. had been
【回答】
B
知识点:动词时态
题型:选择题