Are you going to attend the meeting______next Saturday?

題目：

Are you going to attend the meeting______next Saturday?
A holding
B hold
C will be held
D to be held
選項做的是句子的什麼成分?說明理由謝謝
非謂語不定式在這裡做什麼句子成分？

解答：

選D,這裡是不定式作定語,修飾the meeting
表示在下周六即將召開的會議!