Idiom
For each of the following sentences four alternatives are given. You are required to choose the correct meaning of the idiom or phrase given or underlined in the sentence. To turn over a new leaf

To cover up one's fault by wearing new marks
To change the old habits and adopt new ones
To change completely one's course of action
To shift attention to new problems after having studied the old ones thoroughly

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Idiom
To plough the sands

To work hard to achieve one's aim
To busy oneself in a way which cannot lead to any profitable result
To advance one's position in life
To afford hope or ground for expecting a good result

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Idiom
To disabuse one's mind

To remove a misapprehension
To banish from one's mind a thought
To proceed cautiously so as to avoid risks and dangers
To conceal something

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