“乐极生悲”这一成语告诉我们

A．快乐是一种不良情绪，会产生消极的影响

B．快乐是一种不良情绪，会产生积极的影响

C．过度的喜悦会使我们忘乎所以，可能产生消极的后果

D．过度的快乐一定会导致悲剧性的结果

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．manage

B．save

C．backup

D．dispose of