Don’t turn off the computer before closing all programs,________ you could have problems.                                                         
#11010
A
or
B
and
C
but
D
so
推荐题目
---He is______ a brave man. ---we can’t admire his courage ______.
#12849
A
actually; very much
B
indeed; too a lot
C
really; too much
D
truly; a bit
The police wondered________ of them is________ such a traffic accident.
#12980
A
whom; blaming to
B
who; to be blamed on
C
who; to be blamed for
D
which; to blame for