the invasion from modern culture
no real action to reflate it
the level of trust to
inadequate respect comes up
These are not a good grasp of colloquial language. Possible solution: Get some lessons for academic vocabulary in use.
For the real test, when writing a conclusion for task 2, I always start with the words "In conclusion". There's no reason why you should learn any alternatives.
Your writing is good. However, this lacks task response, flow of the sentences, and vocabularies.
Possible solution: instead of writing, you'd better draft essays as many as possible. By this, you can examine essays more closely: what language style you will use, what the tone is, what the purpose is..., expository or argumentative essays?