A. I use <b>the</b> pivot table in Excel.<br/>B. I use pivot table in Excel<br/><br/>C. I use <b>the</b> VLOOKUP in Excel.<br/>D. I use VLOOKUP in Excel.<br/><br/>1. Should I use "the" or not in each pair above?<br/>2. If I added "tool" after "VLOOKUP" in C and D, would "the" be necessary? Or is it OK without?