一个英语语法题,我选的是B.请问为什么A是对的,B是错的.

题目

一个英语语法题,我选的是B.请问为什么A是对的,B是错的.
More and more jobs are being advertised on the Internet.However,with the Internet there is a risk ) receiving unsuitable applications from all over the world since it's so easy to click and apply and just try your luck.
选项
A.OF B.IN
括号（？）内是填空的对象

答案

a risk of .
后面说的是这个风险的具体内容 就是这个风险本身
a risk in.
说的后面做事情会有风险
举个例子
打篮球的时候 会有受伤的风险
a risk of injury
打篮球的风险
injury is a risky in playing basketball.