no one is interested in this film .are they 为啥是are they .（in vain did we try ）to Persuade her to give up her pian .怎么不是in vain we tried .students were not always more interested in their grades than in the corrections i had so carefully made 翻译
问题描述：
no one is interested in this film .are they 为啥是are they .
（in vain did we try ）to Persuade her to give up her pian .怎么不是in vain we tried .students were not always more interested in their grades than in the corrections i had so carefully made 翻译
答
当表示人的复合不定代词作主语时,反义疑问句的主语用they.
当表示物的复合不定代词作主语时,反义疑问句的主语用it.
For instance:
(1) Someone leaves the key in the school,aren't they?
(2) Something important is known by the public,isn't it?