题型：填空题 给下列的问句选择合适的答语。( ) 1. What do you know? ( ) 2. What's the famous waterfall in Canada? ( ) 3. What are these? ( ) 4. What's the capital city of Canada?A. Ottawa. B. I know the flag is red and white. C. It is Niagara Falls. D. These are the Rocky Mountains. 查看答案