All the drivers drive carefully to prevent the traffic accident .

Suddenly the small boy stopped and bentdown as if to _____ something

.Let’s ______ the children into 4 groups. Each group will have a ______ room to sleep in.

It’s usually a common _______ that journal websites offer readers their free online editions of articles and other information.

I didn’t see you at the meeting yesterday. Why— I _____ for an important telephone call at that moment.