Student or Learner
1) Is is used with he, she, it or singular noun OR nouns?
Which is correct?
Insert the CD into CD room OR Insert the CD in CD room?
Which one is correct?
Thanks in advance
"Is" is used with he, she, it and singular nouns - NOT plural nouns. See this exercise for more help.
The correct sentence would be "Insert the CD into the CD-Rom." "Into" is used because there is a destination involved.
If the CD was already at its destination, we would say "The CD is in the CD-Rom."