Having checked the doors were closed and ______ all the lights were off, the boy opened the door to his bedroom.
#31421
A
why
B
that
C
when
D
where
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___________you try to do something beyond what you have already mastered, you will never grow.
#30739
A
Since
B
When
C
Though
D
Unless
__ __ many Chinese women have received higher education, there are still obstacles that prevent them from enjoying the same opportunities for education and employment as men．
#33681
A
Whether
B
Because
C
When
D
Although
Liping works very hard at his lessons .He didn’t get the first place in the exam ,_______.
#80206
A
though
B
yet
C
however
D
although
Mom，don’t you think it's OK to play once in a while ____________ it doesn’t affect my studies?
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A
even if
B
unless
C
so that
D
as long as