题目内容

Electronic goods such as laser prints and computers all contribute to_________

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A teacher who is 74 will be able to make his lessons more lively.

You can save a lot of time and avoid misunderstandings if you communicate clearly and ____________.

All the flights having been canceled because of the snowstorm, many passengers_________(除了乘火车外什么都不能做)

A teacher should be tolerant because humans tend to have 73（1） and to be 73（2）.