Idiom
A fool's errand

A blunder
None of these
A useless undertaking
An impossible task

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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. I raked my brains to solve this difficult problem.

I used my common sense
I consulted several people
I brainwashed several experts
I subjected my mind to hard thinking
I read number of books

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Idiom
To cool one's heel

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

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