How much shall I pay for the phone call? —-You ____ .This is free of charge.

Why don’t we choose that road to save time ?—The bridge to it __________ .

Children are tired of learning often because they are________to do better than they can, both at school and at home.

Behind bad luck comes good luck. So somethinggood happened _____ you..

We couldn’t understand: what could ______ his suddenchange of mind