Idiom
White blood cell act

For clotting blood
As a source of energy
As a medium for oxygen transport from lung to tissues
As a defence against infection

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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 cannot get along with a man who plays fast and loose.

does not know how to behave himself
behaves in an unreliable and insincere way
has a loose tongue
lives a life of ease and luxury

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