Either you or the headmaster ___ the prizes to those gifted
2个回答

D

be to do sth表示将要做某事,be doing表示正在做.而原句意思应该是即将颁奖给学生.例句:I don't know what is to be done next. 不知下一步该怎么做.

用is,这是属于主谓一致原则中“就近一致”原则,适用于"or, either... or, neither...nor, not only... but also"等句型,也就是说谓语要和后面的主语保持一致.

下面是几个例句:

You or Tom is going on business.

Neither you nor I am wrong.

Not only the students but also the teacher wishes for a holiday

希望能有所帮助:)