You can press the ____ keys to insert a line break.

Although the QWERTY keyboard can be viewed as inefficient, the reason why the keyboard format never changed is mainly due to:

A) efficiency. B) tradition. C) a monopoly in the keyboard-making industry. D) exercising the joints to avoid arthritis.

A cross-reference is a(n) ________ entry associated with a different word or phrase

Fill in the blank(s) with correct word