6、customsstay_________.( )A.asameB.thesameC.thesameasD.asameas答案:B staythesame意为“保持不变”,句后没有任何成分,所以as省略掉。19.PingPongispopularamongChina,_________bothyoungandoldcan_________.( )A.aboutit;takepartinB.init;takepartC.inwhich;takepartinD.inwhich;takepart答案:D which