（）是投资建设项目采购的首选方式。A．网上采购 B．直接采购 C．招标投标 D．委托

— How are you?

— I'm fine, ______________.[ ]

A. thanks

B. thank

C. a thank

D. the thank

假定英语课上老师要求同桌之间交换修改作文，请你修改你同学写的以下作文。文中共有10处语言错误，每句中最多有两处。错误涉及一个单词的增加、删除或修改。

增加: 在缺词处加一个漏字符号 (∧), 并在其下面写出该加的词。

删除: 把多余的词用斜线 ( \ ) 划掉。

修改: 在错的词下划一横线，并在该词下面写出修改后的词。

注意: 1. 每处错误及其修改均仅限一词；

2. 只允许修改10处，多者（从第11处起）不计分。

Dear Sir or Madam,

I see your advertisement in a student magazine and I’m interesting to know more about your diving courses. First of all, I should explain that although I can swim I’m not very confident in the water. But you mentioned your advertisement that your instructors are full qualified. Thus I believe they’ll be able to teach someone as me to dive. I have one week’s holiday in the three week of June and would like to know that if there’s a course running at that time. How much does a week’s course worth? Finally, if I decide to go ahead, are there any special equipment I need to buy or is everything provided by your company?

I am looking forward to hear from you.

Sincerely yours,

Tom

草履虫具有呼吸和排泄功能的结构是（　　）

A．口沟

B．食物泡

C．细胞质

D．表膜

华北平原与黄土高原的天然分界线是    [ ]

A．秦岭山脉      

B．巫山            

C．阴山山脉      

D．太行山

今年春节，王华随家人外出旅游到了武陵山区的多个土家族苗族自治地区，受到了少数民族同胞的热情款待。她品味了特色餐饮店提供的民族风味小吃，观看了民间艺术团准备的摆手舞等民俗文化表演。这次旅行让王华 （    ）

①体验到了不同民族的风俗习惯是有差别的，但都应得到尊重

②认识到民族区域自治制度是我国的根本政治制度

③感受到各族人民平等互助，安居乐业，促进了家乡的繁荣发展

④看到各民族共同维护民族团结，为实现中国梦而努力奋斗

A．①②③

B．②③④

C．①③④

D．①②④