Please read the article and email me your summary.
http://www.sunsmart.com.au/downloads/Vitamin_D/vitamin_d_and_uv_radiation.pdf
You can use the following in your writing:
According to the report, .....................
According to the author,......................
The author states that .................
The author claimes that .........................
It has been proven that .........................
Based on scientific research, ............................
In addition to that, ..........................
Moreover, ...............................
It has been widely argued that ............................
If you feel that your English is not yet good enough, you can use these web sites to do some work on your own.
http://www.dailyesl.com/
http://www.eslyes.com/
http://www.cdlponline.org/
http://www.elllo.org/
http://www.esl-lab.com/
And of course remember to check this blog to get updates on what needs to be done in this intake.
Best Wishes
