Creating world peace is a rather difficult goal, ____ calls for efforts of many generations.

Is this a bus – _______. It’s a car.

Tom’s desk is always clean and tidy. —Yes, he hisschool things every day.

In the recent coal mine accident, more than onehundred miners were left ______underground.

The IOC Evaluation Commission has come to a ________ conclusion that Beijing is capable of hosting a successful 2022 winter Olympics.