They knew they had to________action to deal with the plague before it spread to other areas.

The question he asked was _______ I come here.

Eachstudentistogiveashort___(speak)totherestoftheclassattheendofthesemester.

Another worry is that telecommunication systems may isolate people ______ each other.

We knew the boss________be angry if we didn ’t finish the work in time.