It was in the mid-1980s that cartoons be
题型:选择题
问题:
It was in the mid-1980s that cartoons began to take off in China,_________there were only pictured-story books.
A.when
B.after that
C.before which
D.where
It was in the mid-1980s that cartoons began to take off in China,_________there were only pictured-story books.
A.when
B.after that
C.before which
D.where