Spotting Errors

Put 'the' before 'Paradise Lost'. Names of great books are preceded by definite article 'the'. Also refer to rule 2, under some important rules.

Change 'each' other' to 'one' another'. 'Each' other used in reference to two; in reference to more than two 'one another' is used.

Change 'which' to 'that'. Relative pronoun referring to man and animal together is 'that' instead of 'which'.

Delete 'himself' after 'fed'. Verbs such as 'feed', 'hide', 'bathe', 'turn', 'keep' etc. are not followed by reflexive pronoun.

Change 'I' to 'me'. 'Between', and for the matter all prepositions are normally followed by pronoun in objective form.

Delete 'the' before 'manager'. When two singular subjects refer to the same person, only the first should be preceded by article.

Substitute 'who' by 'as'. 'Such' is followed by relative pronoun 'as' instead of by who.

Put 'the' before 'Head of the Department'. When tow subjects refer to two different persons, article should be used before each one of them.

Put 'a' before 'lot'.

Change ‘each’ other to ‘one another’. ‘Each other’ is used in reference to two; in reference to more than two, ‘one another’ is used.

Put 'a' before 'very'.

Put 'those of a' before 'boy'. It two different subject are intended by the same word we should not have one of them left out and implied.

Change 'make' to 'makes'. When two subjects are intended to express jointly a singular idea of a single whole, the verb is singular.

While 'much' can modify past participles, 'very' is the standard and more idiomatic adverb to use with 'surprised' when it functions as an adjective describing a state of mind.

The sentence is grammatically correct and idiomatic, with no errors in any of the parts.