按要求改写句子：（1）Water is very important.（改为感叹句）（2）I'd like a piece of pizza.（改为一般疑问句）（3）A rice dumpling cost （3 yuan 5 jiao）.（对括号部分提问）（4）I'm selling （American）food.（对括号部分提问）（5）He has never visited Canada.（改为反意疑问句）
问题描述：
按要求改写句子：（1）Water is very important.（改为感叹句）（2）I'd like a piece of pizza.（改为一般疑问句）（3）A rice dumpling cost （3 yuan 5 jiao）.（对括号部分提问）（4）I'm selling （American）food.（对括号部分提问）（5）He has never visited Canada.（改为反意疑问句）
答
How important water is !Would you like a piece of pizza?How much does a rice dumpling cost?What kind of food are you selling?He has never visited Canda,has he?