_________you have a rich knowledge of Chinese history, try acting as a guide for these foreign visitors.
#31038
A
Unless
B
Though
C
Now that
D
Ever since
推荐题目
. Both look very strong and fast,_____ one runner speeds ahead and wins the race.
#80451
A
Therefore
B
And
C
But
D
While
An completely new district of industry has appeared in ________ used to be wasteland.
#30108
A
which
B
that
C
what
D
where
Perhaps the day will come ____ people will be able to breathe clean air in cities．
#32785
A
when
B
while
C
as
D
since