In our school everystudent has to choose a club to join, so about one ________ students havejoined the Sports Club.
句意：在我们学校，每个学生都要选择一个俱乐部去参加，所以大约有一百名学生参加了体育俱乐部。
考查数词的用法。表示确切的数量，要用基数词+数词的单数形式；表示概数，用数词的复数形式+of。空前one是基数词，故此空应填数词的单数形式，故选C。
In our school everystudent has to choose a club to join, so about one ________ students havejoined the Sports Club.
My mother will be________ years old next week. I’m planning to buy a gift for her ________birthday.
Our country isnearly________years old. We'll celebrate its________birthday on October 1, 2019around the country.
Today is my littlebrother's ________ birthday, so I put________candles in the cake.
My grandparents live inan old apartment with ________ floors and they are on the ________ floor.
He got ________ birthdaycakes on his ________ birthday.
We are preparingprograms to celebrate our country’s ________ birthday.
—I like number “9” best,because I think it stands for “long lasting”.
—Me too. So I chose ________ floor to live on.
Please pass me_________book on the right.
— What did the teachersay?
—He told us to go over__________lessons.
