--Look !The telephone is broken .Someone damaged it ______purpose.--That may be right. But perhaps it was broken ________ accident.
Whatever happens, Tom, ________ drugs.
If a healthy environment is gone, ________ everything that our life depends on.
—Under no circumstances ________ the door to the Data Centre unlocked.—I promise I'll be more careful in future.
The drug used to treat this disease causes bad side effects, some of which ________ deadly.
.No sooner ________ down on bed ________ the telephone rang.