用所给词的适当形式填空。

1. How important is _____ (keep) healthy to you?

2. Here's part of their _____ (discuss).

3. Cola tastes _____ (good) than water.

4. But I prefer _____ (not eat) too much fried food.

5. This man doesn't mind _____ (eat) burnt food.

变压器温度升高时绝缘电阻值（）。

A.降低；

B.不变；

C.增大；

D.成比例增大。