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. His most trusted friend proved to be a snake in the grass.

an unreliable and deceitful person
a hidden enemy
cowardly and brutal
low and mean

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Idiom
To cool one's heel

To rest for sometime
To be kept awaiting someone
To remain in a comfortable position
To give no importance to someone

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