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 has reached present position in his job through elbow grease.

his good connections
flattering his superiors
his persistent fighting
his hard work

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Idiom
Which statement regarding the mammalian heart is correct?

When the right atrium contracts, it forces blood into the left atrium
Blood is pumped from the heart via the atria
In the adult heart, blood in the right chambers of the heart cannot enter the left chambers without passing through the lungs
Oxygen-loaded blood moves only through the right side of the heart

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