In the past the children were made ______15 hours a day.
| A．to lock | B．work | C．to work | D．lock |
People send out sky lanterns to ask for help when in trouble, but now sky lanterns ____ celebrating the festivals.
| A．used to; are used to |
| B．used to; are used for |
| C．are used to; are used for |
| D．are used to; are used in |
Before you go to Canada, you need to learn more it.
| A．from | B．in | C．by | D．about |
Earthquakes always happen , so it is difficult to know when they come.
| A．hopefully | B．suddenly | C．usually | D．luckily |
It’s every policeman’s dream to keep people and the traffic in good order.
| A．safe | B．healthy | C．busy | D．famous |
We all find _________ important to do what the teachers tell us.
| A．that | B．this | C．it | D．them |