Dr$.$ Blake is retiring at the end of the month. There will be an unoccupied office upon his departure, and it is big in size. Because each and every one of the other offices is fully occupied, it is recommended that we convert Dr$.$ Blake$$s office into a lounge. It is absolutely essential that this issue is discussed at the next staff meeting.

Because every other office is filled, we should convert Dr$.$ Blake$$s office into a lounge.

Because every other office is occupied, it$$s recommended that we should convert Dr$.$ Blake$$s office into a lounge.