The general manager’s _____ directions confused the staff, who didn’t know what to do.
—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.
________ about wild plants that they decided to make a trip to Madagascar for further research.
Fighting an artificial greenhouse effect seems to be the greatest of environmental challenges, ________?