The Internet is increasingly accessible at school and at home. _____many parents and teachers are sometimes not as prepared as we should be to warn children about Internet threats.

The incomes of skilled workers went up. ______, unskilled workers saw their earnings fall.

---- Do you think it's a good idea to make friends with your students? ---- _____ , I do．I think it's a great idea．

Mr. Bryan is a/an _______ secretary in our office, for he is able to do tasks successfully, without wasting time or energy.

What a terrible experience ! ________, you’re safe now —— that’s the main thing.