用must造句并回答。回答肯定句、否定句各10个。谢谢了

1、Must I clean the dining room at once? 我必须马上打扫膳厅吗？Yes, you must. 是的。No, you needn't.不必马上打扫。（No, you don't have to.）2、Must I go to school? 我今天必须去上学吗？Yes,you must. 是的，必须的。No,you needn't. 不必了（在家呆着吧）。3...