Idiom
It is disease which used to exist in the past in most countries of old world.

Small pox
Meseale
Cholera
Malaria

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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 plough the sands

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

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