第一第二都选I will.第一句的would并非是过去时,说现在用过去只是为了显得委婉一些,回答的时候不用would.
1. Would you open the door,please? Yes,I will
2. Will you open the door,please?Yes,I will
第三句给的选项有错,应该填Shall.表示征求说话对象意见,意思是：你要他打开门吗?
3. Shall he open the door? ----Yes,please.