Although the situation was tough during the economic crisis now things are beginning to .
A. look up
B. keep up
C. set up
D. build up
网友回答
(答案→)A. look up
B. keep up
C. set up
D. build up
解析： 考查短语辨析。look up好转，keep up保持，set up建立，build up增强，句意：虽然这种形式在经济危机期间很艰难，但是现在一切开始好转。故选A。