【C18】A．interfereB．interveneC．interchangeD．intermix

【C18】A．onB．beforeC．atD．in

【C18】A．merelyB．alwaysC．mainlyD．almost

【C18】A．illegalB．oddC．vainD．wrong

【C18】A．atB．toC．inD．of

【C18】A．thatB．whichC．whatD．／

It is rude to _____ people when they are talking.A.interfereB.interruptC.interpretD.in