下列加点的字注音全正确的一组是（   ）

There are many people _______ behave so well all time _______they are respected by everyone around

fety of gas, the government has checked the city’s gas supplysystem thoroughly

It is______ of you to rush into the teachers’ office without knocking at the door.

____ from space, the earth, with water ____ seventy percent of its percentage, looks a “blue ball”. [ ]