题目内容

____ joyful he was to meet his brother again!

A. How
B. What
C. What a
D. What an

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Let us pass, ____?

A. shan’t we
B. shall we
C. won’t we
D. will you

I suppose he’s serious, ____ ?

A. do I
B. don’t I
C. is he
D. isn’t he

You had better not smoke here, ____?

A. will you
B. had you
C. shall you
D. have you

角膜边缘出现黄色或棕色的色素环,称为凯-费环,其原因为( )

A. 维生素A缺乏
B. 铜代谢障碍
C. 类脂质沉着
D. 先天性铁缺乏

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