it is necessary ( )for a job interview .having the answers ready will be of great help.a,to prepare b,to be prepared c,preparing d,prepared选什么,为什么,选A可以吗,为什么?

问题描述:

it is necessary ( )for a job interview .having the answers ready will be of great help.
a,to prepare b,to be prepared c,preparing d,prepared
选什么,为什么,选A可以吗,为什么?

应该选B ,it做形式主语,真正的主语a job interview,与prepare 是被动关系,所以选B的