Each of is always followed by a singular verb. Correct: “Each of the players *has* received…”

When using “Neither…nor”, the verb agrees with the nearer subject (friends – plural). Use “are”.

Use past tense (“completed”) with past time expressions like “yesterday”. Remove “has”.

Who is subject; “whom” is object. Correct: “whom I met”.

Many a is followed by a singular noun and verb. Correct: “has failed”

One of the best *movies* – plural noun after “one of the best”

With “either…or”, verb agrees with the subject closer to it (“students” → plural). Use “are”

Returned itself means “came back”. “Returned back” is redundant.

Distances take singular verb. Use “is” instead of “are”.

One should be followed by “one’s”, not “his”. Correct: “respect one’s parents”

Double comparative. Use either “more clever” or “cleverer”, not both.

Hardly means “barely”. Correct: “He works *hard*”

Enjoy is transitive. Correct: “They enjoyed *the holidays*”

Senior is followed by “to”, not “than”. Correct: “senior to me”

Each makes subject singular → singular verb: “was given”

Advice is uncountable. Remove “an” or say “a piece of advice”

Subject form needed: “My friend and *I* are going”

Used to + V1 is wrong. Correct: “used to getting up”

Scenery is uncountable. No plural form. Correct: “The scenery”

Problems is plural. Correct verb: “There *are* many problems”

Use simple past for past time reference: “I *read* the book yesterday”

Best is superlative, not comparative. Use “better than”

Indirect questions follow statement order. Correct: “where he lives”

Enough comes after adjective: “rich enough”

None can be singular/plural. With “of the boys”, prefer singular → “has come”

Which refers to things. For persons, use “who”

Team is collective noun. Singular → “is celebrating”

Use “told” with object. Correct: “She told me”

No error here

Much is for uncountables. Use “Many people”