discovered為什么呢？還有一題the poor dog had no food at that time.(保持原意)the poor dog had ______ _______ eat at that time哥倫布發(fā)現(xiàn)美洲新大陸發(fā)現(xiàn)=discoverthe poor dog had __nothing ____ ___to____ eat at that time再問兩題給加分??！what does expo mean？（保持愿意）_____ the ______ of expo.i prefer the red ballpoint pen.(同上)i_____ the red ballpoint pen_____What's ......meaning.....like.......best