問題詳情：
![Intheschoolhall，whereameeting]( "Intheschoolhall，whereameeting")
In the school hall，where a meeting ________， some students are busy preparing for it.
A．had held B．is to hold
C．is to be held D．is being held
【回答】
C [句意：在學校大禮堂將舉行一次會議，有幾個學生正忙着做準備。根據句意“會議將要舉行”，要用將來時態的被動語態，所以選C。be to do結構是將來時態的特殊表達形式。]
知識點：固定句型
題型：選擇題
