Scientiststhinkthatthere
问题详情:
Scientists think that there _____ life on earth for millions of years.
A. has had B. have had C. has been D. have been
【回答】
C
知识点:动词时态
题型:选择题
问题详情:
Scientists think that there _____ life on earth for millions of years.
A. has had B. have had C. has been D. have been
【回答】
C
知识点:动词时态
题型:选择题