摘要：8．People should open the window in the morning to make air in order to keep the indoor air fresh. A．spread B．remove C．float D．circulate 答案与解析:D circulate表示空气.液体等的流通.spread“传播 ,remove“去掉 ,float“漂浮 .

网址：http://m.1010jiajiao.com/timu3_id_3105704[举报]