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

Nowadays, few people form the habit of keeping the habit of candles in the house in case of  power      .

People here see this kind of bird as a _______ of hope, so they never shoot them.

I am sure David will be able to find the library - he has a pretty good ____ of direction.

Shanghai is so full of_______, it seems as if things never stop.