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. This report calls in question all previous research on the subject.

criticises
takes note of
challenges
recalls

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Idiom
Which statement regarding the mammalian heart is correct?

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
Blood is pumped from the heart via the atria
When the right atrium contracts, it forces blood into the left atrium

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