a-There are four continents.   No there aren't.There are five                                        

B-there are six planets in the solar system . .......................
c-there are ten countries in the Europen Union. ................
d-there are red and black blood cells. ....................
e-there is one element in water , hydrogen (H2O)...................
f-There are ten centmetres in a metre. .....................
g-there are more speakers of enflish than chinese. ...........
h-there are seven guestions in thİs exercise. ...............

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