[求助]on condition that...!!!!

Several senior officials spoke to the press on condition that they not be named in the story.

(A) that they not be named

(B) that their names will not be used

(C) that their names are not used

(D) of not being named

(E) they will not be named

答案到底是哪个啊？？？受不了了，有的词典说可以+虚拟，但是有的词典给出的例句是这样的：It is a gift to him on condition that he has a good behavior.(显然不是虚拟).

另外，on condition of sth.的结构又如何呢？

受不了了，请NN执教！不胜感激。

on condition that 是固定结构，与if, unless等一样引导条件状语从句

条件状语从句通常用一般现在时表示将来时，用一般过去时表示过去将来时，或者用动词原形表示虚拟语气

本题中，首先D和E可以排除，没有这种表达方式，要用on condition that

B 中用一般将来时了，不符合条件从句时态用法；C中用一般现在时，与主句的过去时不匹配；

只能用A，用动词原形表示虚拟语气

不知道这么说你清楚没有？

Very helpful!!!

Thx a lot!