题目内容

______ of March is my sister"s birthday.

A. The twenty-one
B. Twenty-one
C. The twenty-first
D. Twenty-first

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在上下颌切牙中,牙根圆且直,可以使用旋转力拔牙的牙齿是

A. 上颌侧切牙
B. 下颌侧切牙
C. 上颌中切牙
D. 下颌中切牙
E. 上、下颌中切牙

one, another, other, the other, others, the others I study Chinese, English and some ______ subjects.

在她五十多岁时

few, a few, little, a little Have you any friends in Shanghai Yes, I have ______ there.

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