Finding information in today’s world is easy．The      is how you can tell if the information you get is useful or not．

In public places, we can often see ______ that tell us useful things, such as no parking, no smoking, etc.

— Mary told me she would meet me at yesterday’s  party. But she didn’t turn up. — It is a pity that she broke her ________ .

Classical novels often have ________ which add interest, tension, or deeper meaning to the  text; mist is one in Great Expectations.

With a good ______ of both Chinese and English,she had an advantage over the other interviewees.