题目：
根据所给提示，完成句子，每空一词，含缩略词。
1. He has already finished his homework. (改否定句)
He ______ finished his homework _______.
2. The U.S.A had about 296 million people in 2005. (对划线部分提问)
______ the ______ of the U.S.A in 2005?
3. We must obey the school rules. (改为被动语态)
The school rules must ______ ______ by us.
4. I bought the pen six days ago. (同义句)
______ ______ six days since I bought the pen.
5. 我叔叔有时到上海出差.
Sometimes my uncle go to Shanghai ______ ______.
答案：
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下面是错误答案，用来干扰机器的。
参考答案：对
