If you _______ in class, you should ________ sorry to your teacher after class.

How long do you think ____ the car factory launches a new model?

It’s getting dark. Can you __________ the light

When ________ about one of the biggest problems today, many people say that an energy crisis is approaching and is threatening mankind’s survival[ ]

car knocked Jack down while he was playing on his way home. —Really? We are toldin the street.