根据句意及汉语提示，写出各单词的正确形式，每空填一词。

1. As soon as they ______ (到达) to the hotel, they held a meeting at once.

2. After Jim answered the phone, he rushed out of the house ______ (立即).

3. Kids ______ (低于) 5 years old can't play with this kind of toy.

4. The dresses ______ (本身) are made of common materials, but they sell well

    because of the famous designer.

5. He seldom ______ (回复) to the e-mails his friends send him.

【20】 技术是一种快速分组交换技术，它综合了电路交换技术延迟小和分组交换技术灵活的优点。