Generally speaking, there _______ be any survivors(幸存者) after such a long time. However, two young people were found _______. Life is super-nature!

All passengers______go through safety check before they take a plane.

 --My computer ____start, no matter how hard I try.--It might have crashed.

— Must we wear our school uniform this afternoon?— No, you. All of us will go on an outing.

 We all know that we ________ our carbon footprint, but I suspect that many people wouldn't be prepared to go as far as Joan Pick, a retired scientist living in south London.