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

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

A．commonB．sharedC．specialD．specific

A．infiniteB．unknownC．boundlessD．ceaseless

【C16】A．commonB．equalC．averageD．special

【C6】A．commonB．ordinaryC．informalD．particular

【C9】A．commonB．sameC．alikeD．similar