跨境到另一个国家购买处方药合法吗？

Is it ___legal to cross the border and buy prescription drugs in another country?

公司无许可证运营合法吗？

Is it ___legal for a company to operate without a permit?

在许多国家，公共场所吸烟是不合法的。

Smoking in public places is not ___legal in many countries.