下列网络拓扑描述正确的是：（）

A.总线型网络

B.环形网络不易扩容节点

C.星型网络可靠性能高

D.网状网

句型转换, 每空词数不限。

1. There are two cars in front of the building.  (对划线部分提问)

    _____ in front of the building?

2. I have got a little brother. (用Jim代替I改写句子)

    Jim _____ 

3. She has got some new pens.  (变为否定句)

    ____________________new pens.

4. His brother has got a new bag. (变为一般疑问句并作否定回答)

    _____ a new bag?

    No, _____ .

5. Lily's family has five people. (改为同义句)

    _____ five people in Lily's family.