阅读下面的短文，然后根据汉语或英语首字母提示写出所缺英语单词的正确形式。
I had a very unusual experience on【小题1】星期天。At around ten   o’clock in the morning, I was walking down the street when a UFO landed in 【小题2】f_____ of me. You can imagine how【小题3】奇怪的it was! An alien got out and walked down the Center Street. I 【小题4】跟随it to see where it was going, and I was very surprised when it went into a souvenir shop. While it was looking at the souvenirs, the assistant called the 【小题5】p_______.

— You look scared. What happened?

    — Well , I _______ along the street ________ the UFO landed.

   A. was walking ; while              B. is walking ; when

C. was walking ; when                  D. is walking ; while

．句型转换（10分）

1.The baby fell asleep when its mother came back. (改为同义句)

The baby ________ fall asleep________ its mother came back.

2.The boy was riding a bike when the UFO landed. (对划线部分提问)

          was the boy           when the UFO landed?

3.Mr. Wang said to Scott " You are hard-working." (改为间接引语)

Mr. Wang told Scott           ________ hard-working.

4.My uncle will go to Australia on vacation next month. He will have enough time. (合并为含if的复合句)

My uncle will go to Australia on vacation next month _________ he________ enough time.

5.如果我的梦想实现了，我将会有很多钱去帮助穷人。(短语翻译)

If my dream _________  _________, I will have lots of money to help the poor.

I had a very unusual experience on1.星期天。At around ten   o'clock in the morning, I was walking down the street when a UFO landed in 2.f_____ of me. You can imagine how 3.奇怪的it was! An alien got out and walked down the Center Street. I 4.跟随it to see where it was going, and I was very surprised when it went into a souvenir shop. While it was looking at the souvenirs, the assistant called the 5.p_______.