蔗糖溶液中溶质是____ ，碘酒中溶剂是____．
小俊用2000元购买了免征利息税的三年期国家建设债券，年利率为3.37％．到期时，小俊可以取回____元．
When the man walked ______ the library, he found a cat at the corner.
