________ the jewels were locked in a strong box，the thieves stole them without any difficulty.
#30445
A
If
B
Unless
C
Although
D
Because
推荐题目
After the wedding ceremony, all the guests attended a reception, _______ lasted through the night.
#32466
A
that
B
when
C
where
D
which
The little boy won’t go to sleep_______his mother tells him a story.
#31821
A
or
B
unless
C
but
D
whether
–Tom seems not so enthusiastic as he was two years ago.--Yes. He’s reached a point in his career_________ he has to decide what to do next.
#30397
A
that
B
when
C
where
D
which
________ you understand this rule, you’ll have no further difficulty.
#80259
A
Once
B
Unless
C
As
D
Until