某工厂原计划a天完成b件产品，若现在需要提前x天完成，则现在每天要比原来多生产产

完成对话，根据对话内容，从对话后的选项中选出能填入空白处的最佳选项，选项中有两项为多余选项。

(Sally's mother is ill. She wishes to take a few days off from school so she goes to her head teacher,

Mr.Smith.)

— Excuse me, Mr. Smith. I'd like to take a few days off.

—    1  

—My mother's ill. I have to take care of her.

— Oh dear! I am sorry to hear that.    2  .

— No, thank you. My mother has caught a bad cold. She has a high fever and coughs day and night. 

    The doctor says my mother has to be in hospital for a few days. I would like to be with her.

— Oh, how terrible!   3  

— I hope to be back next Wednesday.

— That's all right.   4  

— I'll write it immediately.

—   5   I' ll certainly help you with them.

— Thank you, Mr. Smith. That's very kind of you.

A. Is there anything I can do?

B. What's the matter, Sally?

C. I hope your mother gets well soon.

D. How long will you be away?

E. What can I do for you?

F. But you must write a note for permission to be away.

G. Don't worry about your lessons.

John is the tallest boy in the class, _______ according to himself. [       ]

A. five foot eight as tall as

B. as tall as five foot eight

C. as five foot eight tall as

D. as tall five foot eight as

患儿11个月，早产，母乳喂养，6个月加米汤，近半月患儿发热、腹泻，精神不振。查体：面色苍白，肝脾轻度肿大，BBC3.5×1012hL，lib758/L，该患儿的最佳治疗方案为

A．控制感染
B．口服铁剂
C．口服铁剂+维生素C 添加蛋黄、肉末
D．口服叶酸、维生素B12、维生素C
E．口服鱼肝油、钙剂

行政管理机制的特点有（）。

A.内在性

B.系统性

C.客观性

D.自动性

E.可调性

客户必须签约短信通才能使用手机银行。（）