You can select a single range of cells by

A. 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

B. Pressing the Ctrl key while dragging over the desired cells

C. Pressing the Shift key and an arrow key

D. Dragging over the desired cells

Please do not use chat terms. Example: avoid using "grt" instead of "great".