1. 把下列句子改为同义句。

1. （1） It's not easy to lose one's favorite things.

   It's not easy to one's favorite things.

3. （2） I stayed there for some time.

   I stayed there for .

5. （3） It is two years since I bought this bike.

   I  this bike for two years.

7. （4） Our children are getting older.

   Our children are .

9. （5） She is not a student any longer.

   She is a student.