毒品的合法化是一个热门话题。

The legalization of drugs is ___a ___hot ___topic.

在当今社会，无论是公开还是私下，竞争还是合作已经成为一个热点问题。

Whether to compete or to cooperate has become ___a ___hot ___issue in today's society, both in public and private.

关于移民的新政策在选民中是一个热门话题。

The new policy on immigration is ___a ___hot ___topic among voters.