问题 填空题 根据图片和汉语提示完成句子。1. ____________ flag has a leaf.2. Niagara Falls is a ____________ (著名的) waterfall.3. ____________ is south of Canada.4. These are the ____________ Mountains (落基山脉). 答案 1. Canada's 2. famous 3. The U. S. 4. Rocky