41- Name the ystemm through which air pollutants enter our body

A-respiratory body

42- which of the following tree is natural chewing gum

A-Chile

43- which of the following is the frozen dew

A-frost

44- which of the following plant is parasite

A-DOdder

45- who produced the first real useful TV system

A-J.L.Baird

46- how long does the Earth take to move around the sun

A-a year

47- the telephone was invented by

A-A.G.Bell

48- who is planet is the nearest to the sun

A-Mercury

49- wright brothers are inventor of the

A- aeroplane

50- which planet do people live on

A-Earth

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