He _________ happy when he __________ the matches.
A:sees; watches
B:looks; watches
C:looks; sees
D:looks like; see
据报道,2014中国军费预算比上年上涨了12.2%,而美国军费预算比上年下降了1.2%,比较两国军费预算( )
Our class will have a party ____ ____ ____.
若实数x,y满足{x+y≥32x-y≤0x≥0,则z=y-x的最小值为 ( )