Don’t turn off the computer before closing all programs，________ you could have problems. (2013·北京，22)
A．or B．and
C．but D．so
I was glad to meet Jenny again，________ I didn’t want to spend all day with her.
(2013·大纲全国，23)
A．but B．and
C．so D．or
She says that she’ll have to close the shop ________ business improves.(2013·江西，28)
A．if B．unless
C．after D．when
Mark needs to learn Chinese________his company is opening a branch in Beijing.
(2013·山东，26)
A．unless B．until
C．although D．since
You must learn to consult your feelings and your reason________you reach any decision. (2013·湖南，23)
A．although B．before
C．because D．unless
One can always manage to do more things，no matter________full one’s schedule is in life. (2013·辽宁，24)
A．how B．what
C．when D．where
