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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MS Excel
You can auto fit the width of column by

Double clicking on column right border on column header
Double clicking on the column name on column header
Double clicking on the column left border of column header
Double click on the cell pointer in worksheet

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MS Excel
Which tool you will use to join some cells and place the content at the middle of joined cell?

From Format Cells dialog box choose Merge and Center check box
Click on Merge and Center tool on formatting toolbar
From Format Cells dialog box select the Centered alignment
From Format Cells dialog box click on Merge Cells check box

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