閱讀下列短文，從每題所給的四個(gè)選項(xiàng)中選出最佳答案

　　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 ________.

[　　]

A．write
B write zero
C．write numbers
D．sixty-three

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

[　　]

A．28
B．2 8
C．228
D．208

3．Later ________ was used to mean space.

[　　]

A．“not any”
B．letter“0”
C．zero
D．a(chǎn) dot

4．People used circles ________.

[　　]

A．to remember ways
B．to remember numbers
C．not to forget the space
D．to mean nothing

5．The story tells us ________.

[　　]

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

答案：B;B;D;C;A
解析：

1．B;2．B;3．D;4．C;5．A


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