5.I’ve been skating since I was seven years old. (对划线部分提问)

4.Of all the subjects,I like English best.(同义转换)

3.I slept for nine hours last night. (对划线部分提问)

2.My brother joined the League three years ago. (对划线部分提问)

1.　　　 He has been working for five hours(对划线部分提问)

12.You can pick up many beautiful s_____ on the beach every early morning.

11.A g_____ is a ball which made of glass.

10.In the future ,computers will be very c_____,we can find them in each family.

9.It is p_____ cold today,I have to stay inside all day.

8.Victor has been skating s_____ he was five.