# data[].attributes.body
Writing speed
vocabulary use

# data[].attributes.headline
Always I mistook prepositions, I don't know how to judge 

# data[].attributes.subject
Always I mistook prepositions, I don't know how to judge 

# data[].attributes.body
vocabulary and collcation,complex sentence

# data[].attributes.body
Grammar

# data[].attributes.body
vocabulary

# data[].attributes.body
Logic,spelling,time

# data[].attributes.headline
Hard to find and correct mistake on time

# data[].attributes.subject
Hard to find and correct mistake on time

# data[].attributes.body
collocation:i don't know which vocabulary should be used as a proper collocation:(

# data[].attributes.body
collocation

# data[].attributes.body
How to improve the writing

# data[].attributes.body
create a good topic sentence