.—Must I give the pen to the manager ?—No, you may give it to________you think is on duty in the office .
_________ in the fields on a March afternoon,he could feel the warmth of spring.
He was busy writing a story,only _________ once in a while to smoke a cigarette.
_________ the project as planned,we’ll have to work two more hours a day.
. We finished the run in less than half the time _________.