（1）The smart umbrella can tell you the weather and the time.
（2）If it is going to rain，the smart umbrella will send a message to your smartphone.
（3）When you leave the smart umbrella on a bus，it will send you a warning message.
（4）You can by a smart umbrella from a department store now.
（5）The new umbrella looks cool but it is expensive.
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發布：2024/4/20 14:35:0組卷：0引用：1難度：0.0