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　　There were 1 classes this afternoon. We 2 a party for 3 Day.

At about two o’clock in the afternoon, the party 4 . Li Dong and Li Qing hosted(主持) the party. They talked 5 the school life of the Young Pioneers. The students’ parents also 6 at the party. They told us 7 harder. Then they 8 us a lot of presents. 9 , the teachers, the students and parents sat 10 a table with a 11 , some oranges on it. We sang and 12 . 13 had a good time. 14 great party! 15 interesting it is!

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阅读下列短文，从每题所给的四个选项中选出最佳答案

　　Long, long ago there was no zero. To write the number sixty-three, people wrote 63. To write six hundred and three, people wrote 6 3. The space between six and three was there to mean“not any”tens. Sometimes people did not remember the space. It was hard to see and read.

　　Later people used a dot to hold the space. Six hundred and three looked like this 6.3. But the dot was hard to see. So people put a circle around it like this 6⊙3. Then people could see the dot. They remembered the space at last, only the circle around the dot was used. It was like a zero. This is one story of how the zero came to be used.

　　Now zero has many important uses. Zero tells how many. Can you tell some other ways of using zero?

1．Long, long ago people didn’t know how to ________.

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2．Long, long ago if they wrote two hundred and eight, people wrote________.

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3．Later ________ was used to mean space.

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4．People used circles ________.

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5．The story tells us ________.

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A．how Zero came to be used

B．how to write zero

C．what’s the use of zero

D．that zero means a dot, a circle or space