English grammar error-spotting (singular verb with ‘‘each one of …’’): Read the sentence divided into four parts (A–D) and identify the part containing an error; choose ‘‘No error’’ only if none is wrong. ‘‘Each one of the boys / have paid / the tuition-fee. / No error.’’

Given data

• Subject head: ‘‘Each one’’ → singular.
• Verb given: ‘‘have paid’’ → plural auxiliary ‘‘have’’ mismatches.

Concept / Approach
With ‘‘each/each one of …’’, use a singular verb: ‘‘has paid’’. The object phrase ‘‘the tuition fee’’ is fine; hyphenation isn’t required.

Correction
‘‘Each one of the boys has paid the tuition fee.’’

Common pitfalls

• Letting the nearby plural ‘‘boys’’ mislead agreement.

Final Answer
have paid