依次填入下列各句横线处的成语，最恰当的一组是①近日，中通快递董事长赖梅松接受“风云浙商面对面”电视栏目专访，为大家揭开中通快递 背后的真正答案。②我们必须 地维护安定团结的大好形势，反对一切破坏安定团结的言论和行动。③遇事必详为考虑，而后与部下商议， 。④青浦地区江河纵横，海上贸易自古繁盛。建于唐代作为舟船航行之航标的泖塔，是朱家角日趋繁荣的见证。自上海建县后，朱家角即 ，蔚然兴盛，一跃成为商贾云集、烟火千家的贸易集镇。

Did you make it at last?— Yes. But for your help,it _____ a serious loss.

He _____ to us that those eggs which were _____ on the table had been _____ by snakes.

James used _____ on the right in China, but he soon got used______ onthe left in England.

Maria has ____trouble ___math, so she often asks her math teacher for help.