下表是一份简单的项目沟通计划，该计划存在的最严重的问题是（）

A、缺少沟通时间 

B、缺少沟通方式或信息传递方式 

C、接收人不明确 

D、沟通的负责人不应该都是项目经理 

按要求转换下列句型。

1. The blue skirt is my friend's. (对划线部分提问)

    ________ ________the blue skirt?

2. Your mother is a teacher. (用a worker 改为选择疑问句)

    ________your mother a teacher ________a worker?

3. Can't you see its name? (作肯定回答)

   ________, I________.

4. You can put the books on the desk. (改为祈使句)

    ________the books on the desk,________.

5. Jim is a friend of mine. (改为同义句)

    Jim is ________of ________ ________.