It has been announced that candidates______remain in their seats until all the papers have been collested.为什么空格处填shall而不是will呢？
热心网友
shall的语气要弱一点，candidates最好remain in their seats until all the papers have been collested，没有强制性。
热心网友
shall表示“应该”做什么事，will表示将要做什么事，前面的动词是announce，宣布，通告的意思，那么宣布的事情是表示应该怎么做，而不是将要怎么做。