请问英文"证人口供"点写?

证人 = witness(es)
口供 = testimony (testimonies)

witness testimony is the official legal term

Witness' (证人) testimony (口供)..a legal term used mainly to refer to the information that the witnesses give.

证人口供 = witness
證詞[U]
for example:

She was punished for giving false witness.
她因作偽證受到懲處。

the statement given by a witness under examination