Christopher Columbus (cover) America in 1492

discovered 再问： 为什么呢？ 还有一题 the poor dog had no food at that time。(保持原意) the poor dog had ______ _______ eat at that time 再答： 哥伦布发现美洲新大陆 发现=discover the poor dog had __nothing ____ ___to____ eat at that time再问： 再问两题给加分！！ what does expo mean？（保持愿意） _____ the ______ of expo。 i prefer the red ballpoint pen。(同上) i_____ the red ballpoint pen_____ 再答： What's 。。。。。。meaning。。。。。 like。。。。。。。best