Concept:The fixed expression "it is no use" (like "it is no good" and "there is no point in") is followed by a gerund, the -ing form of a verb that works as a noun.
Solution:The blank comes straight after "It is no use", so it needs the -ing form: "crying".
"It is no use crying over spilt milk" is the well-known proverb: there is no point being upset about something that cannot be undone.
A. "cry" is the base form; it cannot follow "no use".
B. "of crying" adds a wrong preposition; we never say "no use of crying".
D. "to cry" is an infinitive; "it is no use to cry" is not standard English.
Key point: Learn the pattern "It is no use + verb-ing": it is no use complaining, it is no use waiting.
Answer:Option C (crying)