There ________ a number of students in our school. The number of the students ________ about 3, 000.

[　　]

If she had worked hard ,she ________ .

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Mary sings English songs well and ________.

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Nobody but Jane ________ the secret .

[　　]

It was not until 12 o'clock that I ________ to sleep .

[　　]

I mean ________ class meeting on Monday afternoon.

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I don't know if my brother ________ tonight .

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Please ________ me up when you are in need of my help .

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─He's never been to the Great Wall．

─________．　　　

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A． Nor have I　　　B． Neither I have

C． Nor am I　　　 D． So have I．

从所给的四个选项中选择最佳答案

At least 450 years ago, corn was ______ China.　　　

[　　]

A．bought to　　　B．brought to

C．bought in　　　D．brought in