【B17】A．actB．voiceC．behaveD．do

【B17】A．ordersB．messagesC．wordsD．letters

【C17】A．actB．voiceC．behaveD．do

【C19】A．actB．charterC．measuresD．legislation

He speaks German, but his native（)is French.A. tongueB. voiceC. accent

【B17】A．commonB．unknownC．modernD．famous

A．effectB．voiceC．efficiencyD．sound