What will you do if there _______?解释句意并说明理由

问题描述:

What will you do if there _______?解释句意并说明理由
Awill be danger
Bis danger
Cis in danger
Dwill be in danger

答案是B.
首先,在if引导的条件状语从句中,通常是用一般现在时表将来.如:
If it is fine tomorrow,we will go out for a picnic.
其次,in danger 在危险之中.
there is danger,有危险.