This structure is generally B2 grammar because it often comes with a wide range of general reference nouns without a determiner. However, more detail can be found in the English Vocabulary Profile regarding meaning and level: make fun of sb/sth = B2 to make a joke about someone or something in an unkind way make …
Why say “is of interest” instead of “is interesting“? ‘is of + noun‘ is more formal and in academic writing, we use the noun form of a word more often. More importantly, ‘of+noun’ functions as a noun in this position. Therefore, it can often collocate correctly with modifiers. For example: “greatest interest” is much more …
B1: IT IS ALSO IMPORTANT TO NOTE | WAS PLEASANTLY SURPRISED TO FIND
Within a text or speech, we can use imperatives to point to its parts for the reader or listener to focus on. For example:
SEE the section on the presence of issues below.
NOTE the lack of a safety manual.
NOTICE the difference between these two charts.