【C4】A．sinceB．asC．soD．thus

【C12】A．SinceB．AsC．WhileD．What

【C4】A．asB．thanC．soD．thus

【C5】A．SinceB．AsC．ThereforeD．Although

【C8】A．SinceB．AsC．IfD．Though

【C4】A．SinceB．FromC．ForD．At

A．sinceB．asC．whenD．until