1. I've been studying computer science since three years ago. (改为同义句)
    I have been studying computer science ______ ______ ______.
2. I can see only a bird in the tree. (就画线部分提问)
     ______ ______ ______ can you see in the tree?
3. Mike cooked more freely than any other student in his class. (改为同义句)
    Mike cooked______ freely in his class.
4. I love thrillers because I like to be scared. (就画线部分提问)
    ______ ______ you love thrillers?
5. They didn't watch TV yesterday. They read books instead. (合并成一句)
    They read books instead ______ ______ TV yesterday.

1. I've been skating for one and a half years.(用since改写句子)
    I've been skating _______and_______  _______．
2. They have been waiting for half a day.(改为一般疑问句)
    _______ they_______ _______for half a day?
3. She is so upset that she can't believe anyone.(改为同义句)
   She is_______ anyone.
4. I have been collecting stamps since 2 years ago.(对划线部分提问)
    _______you been collecting stamps?
5. Please remember to post the letter for me.(改为同义句)
    _______post the letter for me.

1. I have been to the Great Wall. (改为一般疑问句)
    ______ you ______ to the Great Wall?
2. Qingdao has a square. Its name is"May Fourth Square". (合并为一句)
    Qingdao has a square ______"May Fourth Square".
3. You will find Chinese food easily in Singapore. (改为同义句) 
   You won't ______ ______ ______ finding Chinese food in Singapore.
4. The population of this city is 15 million. (就划线部分提问)
    ______ ______ ______ of this city?
5. Many animals only wake up at night. (改为同义句)
    ______ ______ ______ animals only wake up at night.

1. She has been studying in this school for 3 years.(对画线部分提问)
                                                                       
2. He's very frightened.  He can't move. (合并为一句)
                                                                       
3. Lily sometimes goes camping.(对画线部分提问)
                                                                       
4. What are you doing for vacation? (用go camping回答)
    I'm______ ______for vacation.
5. I just finished my model plane.(改为一般疑问句)
    ______ you______ ______ your model plane?