if ______,he promises that he will spare no effort in promoting public welfare

问题描述:

if ______,he promises that he will spare no effort in promoting public welfare
A:elected B:elect C:electing D:being elected
用这是一个什么类型的句式!
这类句式的作法!
独立主格的格式是什么呀?可以省略吗?
I can't thank you ___much for your kindness,because without your help I can't have succeeded in the exam.A.too B.very C.quite D.that
我的QQ是419878271
THS

A
被动的独立主格.
完整的句子应为:If (he is) elected,he promises that he will spare no effot in promote public welfare.