根据句子的意思，用括号中所给汉语提示或英语单词的适当形式填空。

1.A _________ is a person who plans and draws how something will look.

2.There is something wrong with the computer. You should ________(start again) it.

3.A new e_________ (教育性的) CD-ROM called "Online Traveler" has come out.

4.Mr. Liu is a teacher with a lot of __________ (经验). He has ways to make his class lively.

5.We all know that the Great Wall is the s__________ of our country.