We work together to achieve our common purpose:_________world that is safer, cleaner and healthier than one we found.
He has spent I think a lot _______time in reading than she has.
You say he works hard; so he does,and_______.
I will never know what was on his mind at the time,and nor will_______.
His parents do not allow him to play games online. However, he does that_______.
Don't _______ any longer. Anyone makes mistakes.