The world's population has grown to more
题型:选择题
问题:
The world's population has grown to more than six times _____ it was in 1800. [ ]
A. which
B. that
C. what
D. the number
The world's population has grown to more than six times _____ it was in 1800. [ ]
A. which
B. that
C. what
D. the number