We should not only be confident ____ ourselves, but also think things ____ before making decisions.

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

My friend Martin was very sick with a strange fever; ______, he could neither eat nor sleep.

Two hundred of the tourists were saved from danger in Taiwan, but the rest ______ still missing.—If the travel agency ______ more safety measures, this accident could have been avoided.[ ]

You ________ cross the road when the traffic lights are red.