选词填空（本题有6小题，每小题0.5分，共3分）
选择方框内的单词完成下列句子，使句子通顺、正确。每词限用一次

A. succeeded  B.fresh   C. death   D.below   E.provide  F. unless

Night temperature usually falls ________ zero in winter here.
Let’s open the windows and have some ____________ air in here.
We tried our best to solve the problem.Finally we________________.
Could you _______me with information about student exchange programs?
Susan will not arrive at the airport on time ______________ she hurries up.
He had to make a living by himself after his father’s ___________.