THE GENERAL HOSPITAL WAS ABLE TO IMPROVE PATIENT CARE SIGNIFICANTLY WITHOUT HIRING MORE STAFF BY _________ IN A NEW INFORMATION SYSTEM

12. - BÀI TẬP VỀ TỪ LOẠI
BÀI TẬP VỀ TỪ LOẠI

12. The general hospital was able to improve patient care significantly without hiring more staff by

_________ in a new information system.

A. invests

B. invested

C. investing

D. invest