These are not real TOEFL iBT exam readings; however, they are very similar to the readings that you will face in a real exam. I highly encourage you to read them. The most important thing about reading is your speed. You must try to improve your reading pace as much as possible. It is the key for success in reading section
You could enhance you active vocabulary by reading texts and materials in English. However, there are some books such as 400 must have words for TOEFL, Barrons, 504, etc that could help you.
Good Luck
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