Only when they were told of the importance of time ________ wasting time is like wasting part of their lives．

_______the Internet is of great help. I don’t think it’s a good idea to spend too much time on it.

d to increase employment. We need to reduce crime. And _______, we need to protect our environment.

The man ________ coat is black is waitingat the gate.

“The Belt and Road” will help to markets for China as well as other countries along.