The bad weather discouraged us ______ onthe picnic and we had to stay at home.

Great changes have taken place since then in the factory _______we are working.

ays there is so much violence happening in school campuses, _______to parents’ great concern about children’s safety at school .

－As we all know, reading in bed is __________ to our eyes.－I agree with you. Don’t read like that.

To maintain a nice relationship, both sides are advised to focus on _______ they have in common.