1.All dogs are capable of doing harm to human beings.

2.He was one of the least warm human beings I had ever met.

3.There's no snake known that will habitually attack human beings unless threatened with its life.

4.All human beings are much more intelligent than animals.

that 意思是那，那個，指代時間或空間上較遠的事物。

造句：①That is a bus.那是一輛公交車。

② Is that your cup?那是你的杯子嗎？