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 Gear up for

Select the most appropriate meaning of the idiom given in bold in the following sentence.
 At supper, everyone was in high spirits.

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Snake in the grass

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 A fly on the wall

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 Gear up for

Select the most appropriate meaning of the idiom given in bold in the following sentence.
 At supper, everyone was in high spirits.

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 In the same boat

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 Blow up