we are now living in ____ world,where computers rule our work and daily life.So online searches have became ____ must.

问题描述:

we are now living in ____ world,where computers rule our work and daily life.So online searches have became ____ must.
A、a; a B、a; the C、the; a D、the; /
主要是第一个空,为什么.
后一个空是 a
a must 必须的条件,不可缺少的东西
答案选A…………

选A吧,in a world 后边加一个定语从句,也是一个习惯的用法,很常见的!意为我们生活在这样一个阶段