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14.There were ____ visitors in Hong Kong on July 1， 1997 A.thousands B.thousand C.thousands of D.thousand of 15.We have learned about ____ these years. A.several hundreds English words B.hundreds of English words C.hundred of English words D.several hundred English word 16.There are ____ students in our school. A.eight hundred and fifty four B.eight hundred and fifty-four C.hundred of English words D.several hundred English word 17.There are ____ in our town. A.three throusand and eighty-six B.three thousands and eighty-six C.three thousand and eighty six D.three thousands eighty six 18.There are about ____ books in our school library. A.five thousand， three hundred and forty-five B.five thousands and three tundreds and forty-five C.five thousands， three hundred and forty-five D.five thousand， three hundreds and forty-five 19.Six million， six hundred and sixty-six thousand， six hundred and sixty-six is ____ . | 
