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. He knew she was dead but was completely at sea about the cause of her death.

certain
anxious
confused
ignorant

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Idiom
To put one's hand to plough

To take up agricultural farming
Take interest in technical work
None of these
To take a difficult task
To get entangled into unnecessary things

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