With the Internet widely used, a(an)___change has taken place in the way people communicate with one another.

Our       new machines are much cheaper to run.

Medicine should not be kept where it is _______ to children.

—How was your holiday?
—It couldn’t have been   ．I just stayed in the hotel because it was raining most of the time．

Early experiences taught me not to be overly _      about shopping by mobile phone because there is a high risk of being cheated．

The question was so ________ that there was a ________ expression on the teacher's face.

Housing prices keep rising these years. I’ve got about half the space I had 10 years ago but I have to pay          ________now.

Computers and mobile phones, though they are indeed making our life ____ and more ____, have reduced the need for face-to-face communications.

The businessman offered a(n) __________ price for one of her collections, giving her a pleasant surprise. 

The preschool children who watch TV programs with violent scenes are more likely to have sleep problems than those who watched programs        for the age.