Idiom
The smallest blood vessels which are one-cell thick, are called ________

Vena cava
Arteries
Veins
Capillaries

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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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Idiom
Dog in the manger

An undersized bull almost the shape of a dog
A dog that has no kennel of its own
A person who prevents others from enjoying something useless to himself
A person who puts himself in difficulties on account of other people

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