【C18】A．withoutB．asC．butD．or

Never get off the bus（)it has stopped.A.ifB.as soon asC.untilD.or

【C5】A．withoutB．withC．onD．except

【C17】A．andB．whileC．butD．or

【C18】A．forB．andC．butD．or

【C4】A．andB．asC．butD．even

【C10】A．both... andB．as well... asC．neither... norD．whether... or