Only when in danger human beings.A．will attack most snakesB．snakes will most attackC．will

Many items may be dangerous goods and could cause serious accidents when mailed. It is

As far as the woman is concerned, why do only human beings and a few other primates laugh？

Food should be taken in moderate quantity only when one feels hungry.

Not only ______ our money, but we were also in danger of losing our lives. A：we lost B：

In traffic lights, red can only mean stop. But in human languages, limited phonemes can fo

Only when goods can be carried to all parts of th