How do you pronounce 初試?

Q: How do you pronounce 初試? A: co1 si3, e.g.

初試 (co1 si3) — meaning, pronunciation, examples

初試 (co1 si3, chū shì) — preliminary exam; qualifying exam; first try; preliminary testing

初一流流 (co1 jat1 lau4 lau4) — during good mood from festivities over first day of the new year
初不初 (co1 bat1 co1) — At the begining
初交 (co1 gaau1) — new acquaintance
初初 (co1 co1) — in the very beginning
初吻 (co1 man5) — First kiss
初哥 (co1 go1) — (noun) a beginner; a novice; a neophyte