【C15】A．WhenB．WhileC．AsD．Unless

【C15】A．withB．inC．asD．like

【C15】A．neitherB．eitherC．asD．one

【C13】A．WhenB．SinceC．AlthoughD．Unless

【C15】A．whenB．whoC．thatD．what

You’ll have more chances of promotion ______ you work hard.A、sinceB、whileC、asD、once

A. once B. whileC. since D. unless