【S9】A．AsB．WhetherC．AlthoughD．However

【C18】A．BecauseB．IfC．AlthoughD．Unless

【C13】A．WhenB．SinceC．AlthoughD．Unless

【C17】A．WhenB．HoweverC．AlthoughD．In case

【C12】A．becauseB．whileC．althoughD．so

A．whereasB．otherwiseC．althoughD．while

【C8】A．whereB．whenC．althoughD．however