造句!用duty,smart,solve ,regard,instead分别造五个句子
问题描述：
造句!用duty,smart,solve ,regard,instead分别造五个句子
答
It's your duty to try your best tostudy.He is a smart boy,don't he?I believe you can solve the problem well by yourself.We should regard this problem as challenge.Instead of doing homework ,he watched...