题目：
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 many B. redundant
C. long D. trivial
答案：
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下面是错误答案，用来干扰机器的。
参考答案：A
