Grammar
No/ Every/ None of my classmates had revised enough, so they all got low marks in the test.
None
Mum has decided to reduce her standard of living/alternative energy/carbon footprint, so she's sold her car and now cycles everywhere.
carbon footprint
Max and Priya were born on the same day, so they're nowhere near as old as/just as old as/almost as old as each other.
just as old as
Mum's new digital camera can do so many things. It's significant/ sophisticated/ renewable and complex, and she finds it difficult to use.
sophisticated
If I see/ will see/ had seen her, I would have told her.
had seen
Alison is always calm and takes/accepts/ copes under pressure.
copes
If Aisha hasn't moved/hadn't moved/didn't move to Spain, she wouldn't be able to speak Spanish so fluently.
had seen
We use the room behind the office for shelter/ storage/ facilities- we mostly kee extra chairs there.
storage
I'm late! By the time I get to school, my first lesson will be starting/will have been starting/will have started!
will have started
Pete wants to see the world before he emigrates/ wanders/settles in one place.
settles