do you know when and where the youth olympicgame was first held?________in singa

问题描述:

do you know when and where the youth olympicgame was first held?________in singa
________in singapore from august 14 to august 26,2010.
为什么填it was 不填it did

因为你问句里面是was.它填it was 实际上是把first held省略掉了.————It was(first held)in Singapore from August 14 to August 26,2010.