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A digital single-lens reflex camera .... called a digital SLR or DSLR

• is

• was

• are

• were

a digital SLR or DSLR .... the optics and the mechanisms of a single-lens reflex camera

• is combining

• combined

• combines

• combine

In the reflex design, light .... through the lens

• traveled

• was travelling

• travels

• travel

The viewfinder of a DSLR .... an image

• present

• presents

• presenting

• presented

Computer mouse got its ... because it looks sort of like a mouse

• function

• shape

• name

• origin

The first computer mouse .... a wood box with wheels and buttons

• are

• is

• were

• was

A mouse ... the users to create graphic elements on the screen

• allows

• wants

• keeps

• lets

A mouse is .... a very smart pointing stick

• bite

• like

• run

• seem

A mouse and computer .... together

• working

• work

• works

• worked

A computer mouse ... much easier and convenient to work as compared to the keyboard

• been

• are

• was

• is