I’m sure I _____ her four years ago

It is reported that up to now, mountain slides have cut off more than ten villages from the outside world,_____ more than 100 hundred people alive and _____ many houses [ ]

I have no idea ______ it is that makes him puzzled

Look, here’s an English book on the desk, Is ityours? — No, it isn’t _______. It must belong to _______.

How do you like math— I think it’s than English.