It’s crucial that I study for it because it 30％0f the final exam A．makes up of B．makes u

问题补充：

It’s crucial that I study for it because it 30％0f the final exam．

A．makes up of B．makes up C．is made up

答案：

解析：本题考查动词词组。make up组成，构成；be made up of由……组成，故选B。