Without that conversation between them, they would ______ be able to avoid mistakes

You _______ here last week if you were really worried about your work.

30 More than 20 years ago he was badlywounded in the anti-Vietnam war Since then he can only walk _____ an arm-chair

Our class teacher has a gift for creating an atmosphere for us students ________ allows us to communicate freely with each other.

Mary felt quite ______ from the outside world, because she couldn’t get access to the Internet and couldn’t receive any e-mail.