题目内容：

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1.Basketball is so exciting that ______ people play it for fun.

A. million    B. two millions    C. million of    D. millions of

2.—How many friends will come to your        birthday? 

—About        .

A. fifteen; fifteen    B. fifteenth; fifteenth

C. fifteen; fifteenth    D. fifteenth; fifteen

3.Helen loves reading. She has read ____ books this month.

A. five    B. fifth    C. five of    D. fifth of