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Nicki left Peter and returned to Seattle. Now she lives by ________ .
hers
she
her
herself
By herself' means 'alone'. We cannot use any other form of a pronoun in this phrase.
Jake said that he saw Jessica Alba ______ in the street.
yourself
itself
himself
herself
We use here 'herself' to show the importance of an object. In this sentence we mean that the fact of meeting a certain person - Jessica Alba - was very important for Jake. 'Himself' does not relate to the meaning.
Is there _______ who can speak Italian?
everybody
nobody
somebody
anybody
Everybody' and 'nobody' do not relate to the meaning of the sentence. 'Anybody' is used in interrogative sentences, while 'somebody' is used in affirmative sentences.