The book was written in 1946, ____ the education system has witnessed great changes.
#70115
A
when
B
during which
C
since then
D
since when
推荐题目
________ your composition carefully, some spelling mistakes can be avoided.
#67555
A
Having checked
B
Checking
C
If you check
D
To check
The factory was built in a secret place, around ______ high mountains.
#73353
A
which was
B
it was
C
which were
D
them were
I have made great progress ________ his help. Which of the following is not correct?
#69899
A
with
B
because of
C
as a result of
D
because