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
— ____ do you go to the library?— Every week.
#59852
A
How long
B
How soon
C
How often
D
How many times
I haven’t seen you since you came back from holiday. ________ a nice time?
#65044
A
Do you have
B
Did you have
C
Have you had
D
Had you had
I think he has tried his best to improve his handwriting, ?
#64514
A
don’t I
B
do I
C
hasn’t he
D
has he