Помогите пожалуйста плиииииииз

1)It is useless to do it
2)That for advantage (sense) to go there
3)He has decided to continue to take driving lessons
4)He always carries a gun
5)What function of this element
6)He has specially told you about it
7)They work using new computer technologies
8)It is necessary to develop science and technology

Немогу трудно оооооочччченньььь  тттррруууубнннооо