where the english evening will be held has not yet been announced.
问题描述：
where the english evening will be held has not yet been announced.
这句的主句和从句是什么?是什么从句?whether在宾语从句中是什么意思?
答
主句……has not yet been announced
从句where the english evening will be held
主语从句
whether在宾语从句中是“是否”