In the following essay, each blank has four choices. Choose the best answer and write down on the answer sheet.

In low - speed network, it is usually adequate to wait for congestion to occur and then react to it by telling the source of packets to slow down. In high - speed networks, this approach often works poorly, because in the (1) between sending the notification and notification arriving at the source, thousands of additional (2) may arrive. In ATM network, a major tool for preventing (3) is (4) control. When a host wants a new virtual (5) , it must describe the traffic to be offered and the service expected.

5（）

A．path

B．rout

C．circuit

D．way

阅读课文选段，回答问题。

　　乌塔对我这番解释很不满意，马上反驳说□□我也是家里的宝贝□爸爸妈妈□爷爷奶奶也很爱我□不过我们兴趣不同□所以我们有时候一起出去玩□有时候单独出去玩□爱孩子□为什么就不能让他们单独出门□我不明白□你的话不合逻辑□□

1．在文中方框内填上合适的标点符号。

2．“反驳”的意思是_____________。乌塔认为_____________，从中可以看出乌塔是一个_____________的孩子。