They stayed up until midnight _____ the old year out and the new year in. 

The question _____ at tomorrow’s meeting is of great importance.

Play, often ______ as an activity for younger children, is still important in the social development of teenagers.

People in Nome all had diphtheria, a disease that spreads very fast. If ________, it would produce a powerful poison that would kill the patient.

When you come into our school yard, you will notice our beautiful school _____by green trees.