_______ the two are only several days apart in age, they seem to belong to wholly different generations. 
#31480
A
While
B
When
C
As
D
Since
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Mr. Black has been teaching English in a middle school _____ he came to China. 
#33534
A
for ever
B
ever since
C
since then
D
long before
______ you’ve got the chance, you might as well make full use of it.
#31986
A
Now that
B
After
C
Although
D
As soon as