Import the file to the bin (top-left).
Drag the scrubber (red-line cursor) under the preview window to where the clip is to start, then click the START button.
Drag it to the end point, click the END button.
Drag the clip to the timeline or right click on it and PLACE ON SEQUENCE AT START, AT CURSOR, or AT END.
The original file will be preserved, but can be handled as Miggy notes above.