问三道高一语法题 （需要讲解）1.We read newspaper,listen to the radio and w

问三道高一语法题 （需要讲解）
1.We read newspaper,listen to the radio and watch news on TV to keep us informed ____is happening all over the world.
A about that B what C of what D of that
2.Adertising is distinguished from other forms of communication____the advertiser pays for the message to be delivered.
A in that B which C while D in which
3.He had been stranded on the wild island for the three weeks.He was not sure _____he would be able to go back to the civilized world.
A that B whether C / D the way