医生们正在努力对抗这种新出现的病毒。

Doctors are working hard to ___combat the newly emerged virus.

警察与歹徒在街头激烈搏斗。

The police ___fought the robbers fiercely in the street.

政府正采取措施对抗日益严重的空气污染问题。

The government is taking measures to ___combat the growing problem of air pollution.