Great changes have taken place in our school and it is no longerit used to be. A when B ho

问题补充：

Great changes have taken place in our school and it is no longerit used to be.

A when B how C that D what

答案：

解析：考查表语从句。从句it used to be缺表语用连接代词what，“我们学校发生了巨大变化，不再是过去的样子了”选D。