MS Excel
Right clicking something in Excel:

Deletes the object
Selects the object
Nothing the right mouse button is there for left handed people
Opens a shortcut menu listing everything you can do to the object

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MS Excel
You can select a single range of cells by

Pressing the Ctrl key while dragging over the desired cells
Pressing the Shift key and an arrow key
Clicking the upper-left cell in a group of cells and then pressing the Shift key while clicking the lower right cell in a group of cells
Dragging over the desired cells

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