Quote Originally Posted by hazamov
alexB is right, it is response to the Writing task of TOEFL. The task requires to explain main points in the reading passage, and show how the lecture casts doubt on it. Thank you all !

Hazamov,

Just a few examples of what i would write:

alexB is right.The essay was my response to a question posed in a writing task in TOEFL.
alexB is right.My essay was responding to a question posed in a writing task in TOEFL.

If the question posed was :

This task requires you to explain the main points in the passage and show how the lecture casts doubt upon it.

You could answer with :

[The/This] task required [me] to explain [the] main points in the [passage] and show how the lecture cast doubt upon it.


I'm not sure what TOEFL is but i hope that helps mate.