请做一个英语填空

Their board of directory would make（its）first aooearance immediately.

用了of就相当于“的”，their board 就是 directory 的定语，所以看 directory 的话应该用单数

its

board of directory 指代全体董事会成员，是一个整体，所以用its

应该是its，因为 board of directory 是个董事机构

its,前面的是their board of directory,主语是单数的

it 前文提过