A dog reacts to kindness by wagging its tail.

狗摇尾巴以报答人们的爱护。

The eye reacts to the light.

眼睛会对光作出反应。

How do you react to this modern artist's paintings.

你对这位现代艺术家的绘画看法如何?

How did he react to your suggestion?

他如何对待你的建议?

How did the audience react to his remarks?

听众对他的讲话反应如何?

I wondered how he had reacted to such a blunt question.

我想知道他对这种直截了当的质问作出了怎样的反应。