市场包括三个基本因素：有某种需要的人、为满足这种需要的购买欲望和

A．购买渠道

B．购买行为

C．购买场所

D．购买力

The government is trying to reduce people’s fear _________ they are likely to be affected by  the nuclear radiation.

A．whether

B．what

C．that

D．how