下列各句中划线词语运用不正确的一项是（    ）

以半径为R的半圆上任一点P为顶点，以直径AB为底边的△PAB的面积S与高PD=x的函数关系式是（   ）

下列关于丙烯（CH₃﹣CH=CH₂）的说法正确的（   ）

根据中文提示词，用词组的适当形式填空。
（1）My father has ____  ____ (放弃) smoking already.
（2）Nancy got A in the math exam. Her teacher is____ ____ (对…满意) her.
（3）Would you mind ____  the rubbish ____ (带走)?
（4）Chatting on line____ ____ (占据) too much of her time every day.
（5）My home is ____ ____ (离……远) the supermarket.

— I think everyone should play a part in saving our environment.

— I agree. For example, there will be less air pollution ________ we drive less.