The major problem with E-mail is that it is (71) easy to use that people can become (72) with messages (73) they can possibly answer in a day. In addition, mail boxes require some management to (74) messages or archive those that might be required later. Senders don’t always know about your E-mail backlog and often send (75) messages.

A. too B. so
C. very D. much

红桥社区将在春节期间 (143) “迎新春征集社区金点子有奖送福”活动，在居民中间征集好的社区管理建议，更好地 (144) 社区居民服务。居民可以在春节期间随时向居委会的春节热线提出“金点子”，凡是春节期间 (145) 此次活动的居民，只要其“金点子”被采纳，都可以得到一 (146) 礼物作为奖励和新年的祝福。此次活动将从即日起一直 (147) 到大年初七，居委会将选出具有建设性的“金点子”，于正月初八举行颁奖仪式。

A．参考
B．观看
C．帮助
D．参与