根据句意及首字母（汉语）的提示，补全单词。

1. Our teacher always d_      with some students' ideas.

2. Smoking is h____ to your health. You'd better give it up.

3. Her dog's sudden d____ made the girl sad for a long time.

4. ____ （喂养）the animals on the farm is very interesting.

5. We can't find any____ （表达方式）to show our thanks to our teachers.

在行政组织中，下级人员向上级人员表达其意见与态度的程序，称为( )。

A．下行沟通
B．平行沟通
C．上行沟通
D．沟通请示