句型练习。
1. The shirt cost me only 50 yuan.   （就划线部分提问）
                                       did the shirt cost?
2. That dictionary cost me $10 . (同义句)
I                    10                    for that dictionary. 
3. My parents should allow me to study with friends.（改为被动句）?
I should                                     to study with friends.
4. I used to be a naughty boy. (改成一般疑问句)
              you                              be a naughty boy?
5. The little boy cried because he was hungry.（就画线部分提问）
                                     the little boy cry?

句型练习。（10分）

1. The shirt cost me only 50 yuan.    （就划线部分提问）

                                        did the shirt cost?

2. That dictionary cost me $10 . (同义句)

I                    10                    for that dictionary. 

3. My parents should allow me to study with friends.（改为被动句）?

I should                                      to study with friends.?

4. I used to be a naughty boy. (改成一般疑问句)?

                you                              be a naughty boy??

5. The little boy cried because he was hungry.（就画线部分提问）?

                                       the little boy cry?