It was not until the 18th century that man realized that the whole of the brain was involved in the working of the mind， ？
#64932
A
was it
B
wasn’t it
C
did they
D
didn’t they
推荐题目
As a good student, he’s seldom late for school in the morning, ___ he?
#65283
A
was
B
wasn’t
C
is
D
isn't
Yes.We have to say we are now facing unexpected difficulties ahead, but we finally believe nothing can stop us from serving the people heart and soul, _______?
#65404
A
can it
B
can’t it
C
can they
D
can’t they