选择方框内适合的短语并用其正确形式填空。

What teachers say in class ___________ their students.
If something is ___________ it’s going to disappear.
Our class ___________ 52 students, including 25 girls.
We are all ___________ your idea: forming study groups to help each other.
All the Chinese _________ the Big Military Parade which was to be held in Beijing on Sept 3,2015.