________ the civil service has its obvious advantages,it doesn’t necessarily suit everyone.
#30248
A
While
B
Because
C
Since
D
When
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He behaved           nothing had happened. 
#30938
A
even though
B
because
C
although
D
as though
___ she spoke, I ___ realize she was a Japanese.
#79762
A
When, /
B
Until, didn't
C
Before, don't
D
till, didn't
 He’ll come _______ I promise him to buy that new dictionary.
#33514
A
so long
B
on condition that
C
as soon as
D
by the time