按括号内的要求改写下列句子
1.We have known each other for a long time.（改为一般疑问句）
____ you ____ each other for a long time.
2.He flew to New York.（改为现在完成时）
He ____ ____ to New York.
3.They have stayed in China (for 2 years).（对括号部分提问）
____ ____ have they stayed in China?
4.He has kept the book for 3 weeks.（改为否定句）
He ____ ____ the book for 3 weeks.
5.We won't go to the park because it's raining heavily now.（改为同义句）
We won't go to the park ____ ____ the heavy rain.