Frogs get much of their oxygen by means blood capillaries.
Correct answer D. means
Tip: press A, B, C or D to answer, and N for the next question.
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See allThe hormone insulin controls by the amount of sugar in the blood.
Correct answer B. by
Henry stressed the importance in individuality.
Correct answer C. in
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Your house is connected with the main cable TV network.
Correct answer C. with
The need for vitamins of our diet was discovered by a Dutch doctor.
Correct answer B. of
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