2. ——3：人们花了多久建成这座大楼的？

  ——大约两年。

—      the workers to build the building?

—It took them about two years.

1.We were playing basketball at this time yesterday.(对画线部分提问)

  you at this time yesterday?

3. 昨晚八点你在干什么？

    at eight last night?

6. 做午饭

7. 整理好

8. 下午茶

1. 飞回

2. ……怎么啦

3. 对…… 擅长

4. 准备做某事

5. 出去

1. ——你的电脑怎么啦？

  ——它被一个病毒感染了。

  —   your computer?

—It was infected by a virus.

1.病毒n.       2.软件n.

3.代替adv      4.创造v.

5. 地铁n.

5. 当我在读书时，我妹妹在看电视。

My sister was watching TV.

4. 昨天他在滑冰时跌倒了。

He while he was skating yesterday.

3. 火灾发生时,你住在哪个房间里？

Which room when the fire happened?