A. and B. while C. thus D. though
A. intensity B. infinity C. insecurity D. instability
A. 奖金 B. 补助费 C. 报酬 D. 津贴
A. drawn B. redrawn C. retained D. reviewed
A. 竞争关系 B. 合作关系 C. 互不相关 D. 无法判断